90661031 has 8 divisors (see below), whose sum is σ = 91310544. Its totient is φ = 90014400.

The previous prime is 90661001. The next prime is 90661033. The reversal of 90661031 is 13016609.

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 90661031 - 2¹⁰ = 90660007 is a prime.

It is a super-2 number, since 2×90661031² = 16438845083965922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90661033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128981 + ... + 129681.

It is an arithmetic number, because the mean of its divisors is an integer number (11413818).

It is the magic constant of a 566 × 566 magic square.

Almost surely, 2^90661031 is an apocalyptic number.

90661031 is a deficient number, since it is larger than the sum of its proper divisors (649513).

90661031 is a wasteful number, since it uses less digits than its factorization.

90661031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 90661031 is about 9521.6086350994. The cubic root of 90661031 is about 449.2349651391.

The spelling of 90661031 in words is "ninety million, six hundred sixty-one thousand, thirty-one".