90611857 has 4 divisors (see below), whose sum is σ = 103556416. Its totient is φ = 77667300.

The previous prime is 90611839. The next prime is 90611861. The reversal of 90611857 is 75811609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90611857 - 2¹¹ = 90609809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90611897) 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, 6472269 + ... + 6472282.

It is an arithmetic number, because the mean of its divisors is an integer number (25889104).

Almost surely, 2^90611857 is an apocalyptic number.

It is an amenable number.

90611857 is a deficient number, since it is larger than the sum of its proper divisors (12944559).

90611857 is a wasteful number, since it uses less digits than its factorization.

90611857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12944558.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 90611857 is about 9519.0260531212. The cubic root of 90611857 is about 449.1537296656.

The spelling of 90611857 in words is "ninety million, six hundred eleven thousand, eight hundred fifty-seven".