90155901 has 8 divisors (see below), whose sum is σ = 131135904. Its totient is φ = 54639920.

The previous prime is 90155899. The next prime is 90155927. The reversal of 90155901 is 10955109.

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

It is a cyclic number.

It is not a de Polignac number, because 90155901 - 2¹ = 90155899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90155941) 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 7 ways as a sum of consecutive naturals, for example, 1365966 + ... + 1366031.

It is an arithmetic number, because the mean of its divisors is an integer number (16391988).

Almost surely, 2^90155901 is an apocalyptic number.

It is an amenable number.

90155901 is a deficient number, since it is larger than the sum of its proper divisors (40980003).

90155901 is a wasteful number, since it uses less digits than its factorization.

90155901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732011.

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 90155901 is about 9495.0461294298. The cubic root of 90155901 is about 448.3990866771.

The spelling of 90155901 in words is "ninety million, one hundred fifty-five thousand, nine hundred one".