77542741 has 4 divisors (see below), whose sum is σ = 77560812. Its totient is φ = 77524672.

The previous prime is 77542739. The next prime is 77542757. The reversal of 77542741 is 14724577.

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 40271716 + 37271025 = 6346^2 + 6105^2 .

It is a cyclic number.

It is not a de Polignac number, because 77542741 - 2¹ = 77542739 is a prime.

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 77542741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77542441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485 + ... + 12541.

It is an arithmetic number, because the mean of its divisors is an integer number (19390203).

Almost surely, 2^77542741 is an apocalyptic number.

It is an amenable number.

77542741 is a deficient number, since it is larger than the sum of its proper divisors (18071).

77542741 is a wasteful number, since it uses less digits than its factorization.

77542741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18070.

The product of its digits is 54880, while the sum is 37.

The square root of 77542741 is about 8805.8356219044. The cubic root of 77542741 is about 426.4293118180.

The spelling of 77542741 in words is "seventy-seven million, five hundred forty-two thousand, seven hundred forty-one".