90311641 has 4 divisors (see below), whose sum is σ = 103213312. Its totient is φ = 77409972.

The previous prime is 90311621. The next prime is 90311651. The reversal of 90311641 is 14611309.

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.

It is a cyclic number.

It is not a de Polignac number, because 90311641 - 2⁷ = 90311513 is a prime.

It is a super-2 number, since 2×90311641² = 16312385000225762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90311621) 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 3 ways as a sum of consecutive naturals, for example, 6450825 + ... + 6450838.

It is an arithmetic number, because the mean of its divisors is an integer number (25803328).

Almost surely, 2^90311641 is an apocalyptic number.

It is an amenable number.

90311641 is a deficient number, since it is larger than the sum of its proper divisors (12901671).

90311641 is a wasteful number, since it uses less digits than its factorization.

90311641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12901670.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 90311641 is about 9503.2437093868. The cubic root of 90311641 is about 448.6571341263.

It can be divided in two parts, 903 and 11641, that added together give a square (12544 = 112²).

The spelling of 90311641 in words is "ninety million, three hundred eleven thousand, six hundred forty-one".