906865491 has 24 divisors (see below), whose sum is σ = 1407817920. Its totient is φ = 517748112.

The previous prime is 906865489. The next prime is 906865501. The reversal of 906865491 is 194568609.

It is not a de Polignac number, because 906865491 - 2¹ = 906865489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 906865491.

It is not an unprimeable number, because it can be changed into a prime (906861491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230160 + ... + 234066.

It is an arithmetic number, because the mean of its divisors is an integer number (58659080).

Almost surely, 2^906865491 is an apocalyptic number.

906865491 is a deficient number, since it is larger than the sum of its proper divisors (500952429).

906865491 is a wasteful number, since it uses less digits than its factorization.

906865491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503 (or 5496 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 906865491 is about 30114.2074609311. The cubic root of 906865491 is about 967.9381900946.

The spelling of 906865491 in words is "nine hundred six million, eight hundred sixty-five thousand, four hundred ninety-one".