90107557 has 8 divisors (see below), whose sum is σ = 94962560. Its totient is φ = 85263840.

The previous prime is 90107533. The next prime is 90107581. The reversal of 90107557 is 75570109.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90107533) and next prime (90107581).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90107557 is a prime.

It is the 9493-rd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90107527) by changing a digit.

It is a nontrivial repunit in base 9492.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17332 + ... + 21922.

It is an arithmetic number, because the mean of its divisors is an integer number (11870320).

Almost surely, 2^90107557 is an apocalyptic number.

It is an amenable number.

90107557 is a deficient number, since it is larger than the sum of its proper divisors (4855003).

90107557 is a wasteful number, since it uses less digits than its factorization.

90107557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5643.

The product of its (nonzero) digits is 11025, while the sum is 34.

The square root of 90107557 is about 9492.5000395049. The cubic root of 90107557 is about 448.3189244950.

The spelling of 90107557 in words is "ninety million, one hundred seven thousand, five hundred fifty-seven".