906123621 has 32 divisors (see below), whose sum is σ = 1319472000. Its totient is φ = 549792000.

The previous prime is 906123557. The next prime is 906123643. The reversal of 906123621 is 126321609.

It is not a de Polignac number, because 906123621 - 2⁶ = 906123557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906123221) 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 31 ways as a sum of consecutive naturals, for example, 1815630 + ... + 1816128.

It is an arithmetic number, because the mean of its divisors is an integer number (41233500).

Almost surely, 2^906123621 is an apocalyptic number.

It is an amenable number.

906123621 is a deficient number, since it is larger than the sum of its proper divisors (413348379).

906123621 is a wasteful number, since it uses less digits than its factorization.

906123621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 906123621 is about 30101.8873328567. The cubic root of 906123621 is about 967.6741743859.

The spelling of 906123621 in words is "nine hundred six million, one hundred twenty-three thousand, six hundred twenty-one".