90342931 has 4 divisors (see below), whose sum is σ = 103249072. Its totient is φ = 77436792.

The previous prime is 90342893. The next prime is 90342943. The reversal of 90342931 is 13924309.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90342931 is a prime.

It is a super-2 number, since 2×90342931² = 16323690363341522, 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 = 90342893 and 90342902.

It is not an unprimeable number, because it can be changed into a prime (90342961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6453060 + ... + 6453073.

It is an arithmetic number, because the mean of its divisors is an integer number (25812268).

Almost surely, 2^90342931 is an apocalyptic number.

90342931 is a deficient number, since it is larger than the sum of its proper divisors (12906141).

90342931 is a wasteful number, since it uses less digits than its factorization.

90342931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12906140.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 90342931 is about 9504.8898468104. The cubic root of 90342931 is about 448.7089431017.

It can be divided in two parts, 903 and 42931, that added together give a palindrome (43834).

The spelling of 90342931 in words is "ninety million, three hundred forty-two thousand, nine hundred thirty-one".