90156413 has 4 divisors (see below), whose sum is σ = 90530748. Its totient is φ = 89782080.

The previous prime is 90156403. The next prime is 90156419. The reversal of 90156413 is 31465109.

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 35366809 + 54789604 = 5947^2 + 7402^2 .

It is a cyclic number.

It is not a de Polignac number, because 90156413 - 2¹⁶ = 90090877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90156419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186806 + ... + 187287.

It is an arithmetic number, because the mean of its divisors is an integer number (22632687).

Almost surely, 2^90156413 is an apocalyptic number.

It is an amenable number.

90156413 is a deficient number, since it is larger than the sum of its proper divisors (374335).

90156413 is a wasteful number, since it uses less digits than its factorization.

90156413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374334.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 90156413 is about 9495.0730908193. The cubic root of 90156413 is about 448.3999355027.

The spelling of 90156413 in words is "ninety million, one hundred fifty-six thousand, four hundred thirteen".