90951331 has 4 divisors (see below), whose sum is σ = 91118152. Its totient is φ = 90784512.

The previous prime is 90951323. The next prime is 90951349. The reversal of 90951331 is 13315909.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90951331 - 2³ = 90951323 is a prime.

It is a super-2 number, since 2×90951331² = 16544289221343122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90951293 and 90951302.

It is not an unprimeable number, because it can be changed into a prime (90951031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82590 + ... + 83683.

It is an arithmetic number, because the mean of its divisors is an integer number (22779538).

Almost surely, 2^90951331 is an apocalyptic number.

90951331 is a deficient number, since it is larger than the sum of its proper divisors (166821).

90951331 is a wasteful number, since it uses less digits than its factorization.

90951331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166820.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 90951331 is about 9536.8407242650. The cubic root of 90951331 is about 449.7139433004.

The spelling of 90951331 in words is "ninety million, nine hundred fifty-one thousand, three hundred thirty-one".