136472761 has 4 divisors (see below), whose sum is σ = 140161252. Its totient is φ = 132784272.

The previous prime is 136472759. The next prime is 136472767. The reversal of 136472761 is 167274631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83997225 + 52475536 = 9165^2 + 7244^2 .

It is a cyclic number.

It is not a de Polignac number, because 136472761 - 2¹ = 136472759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 3688453 = 136472761 / (1 + 3 + 6 + 4 + 7 + 2 + 7 + 6 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136472761.

It is not an unprimeable number, because it can be changed into a prime (136472767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1844190 + ... + 1844263.

It is an arithmetic number, because the mean of its divisors is an integer number (35040313).

Almost surely, 2^136472761 is an apocalyptic number.

It is an amenable number.

136472761 is a deficient number, since it is larger than the sum of its proper divisors (3688491).

136472761 is an equidigital number, since it uses as much as digits as its factorization.

136472761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688490.

The product of its digits is 42336, while the sum is 37.

The square root of 136472761 is about 11682.1556658007. The cubic root of 136472761 is about 514.8515121603.

The spelling of 136472761 in words is "one hundred thirty-six million, four hundred seventy-two thousand, seven hundred sixty-one".