90152981 has 8 divisors (see below), whose sum is σ = 90837120. Its totient is φ = 89471952.

The previous prime is 90152977. The next prime is 90152999. The reversal of 90152981 is 18925109.

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 90152981 - 2² = 90152977 is a prime.

It is a super-2 number, since 2×90152981² = 16255119966372722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90152911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97640 + ... + 98558.

It is an arithmetic number, because the mean of its divisors is an integer number (11354640).

Almost surely, 2^90152981 is an apocalyptic number.

It is an amenable number.

90152981 is a deficient number, since it is larger than the sum of its proper divisors (684139).

90152981 is a wasteful number, since it uses less digits than its factorization.

90152981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 90152981 is about 9494.8923637922. The cubic root of 90152981 is about 448.3942456574.

The spelling of 90152981 in words is "ninety million, one hundred fifty-two thousand, nine hundred eighty-one".