90031197 has 4 divisors (see below), whose sum is σ = 120041600. Its totient is φ = 60020796.

The previous prime is 90031171. The next prime is 90031199. The reversal of 90031197 is 79113009.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79113009 = 3 ⋅26371003.

It is not a de Polignac number, because 90031197 - 2¹² = 90027101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90031199) 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, 15005197 + ... + 15005202.

It is an arithmetic number, because the mean of its divisors is an integer number (30010400).

Almost surely, 2^90031197 is an apocalyptic number.

It is an amenable number.

90031197 is a deficient number, since it is larger than the sum of its proper divisors (30010403).

90031197 is a wasteful number, since it uses less digits than its factorization.

90031197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30010402.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 90031197 is about 9488.4770643133. The cubic root of 90031197 is about 448.1922488161.

The spelling of 90031197 in words is "ninety million, thirty-one thousand, one hundred ninety-seven".