890764861 has 16 divisors (see below), whose sum is σ = 1124769024. Its totient is φ = 687354624.

The previous prime is 890764843. The next prime is 890764873. The reversal of 890764861 is 168467098.

It is a cyclic number.

It is not a de Polignac number, because 890764861 - 2²¹ = 888667709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890764891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159990 + ... + 165463.

It is an arithmetic number, because the mean of its divisors is an integer number (70298064).

Almost surely, 2^890764861 is an apocalyptic number.

It is an amenable number.

890764861 is a deficient number, since it is larger than the sum of its proper divisors (234004163).

890764861 is a wasteful number, since it uses less digits than its factorization.

890764861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325500.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 890764861 is about 29845.6841268549. The cubic root of 890764861 is about 962.1756432444.

The spelling of 890764861 in words is "eight hundred ninety million, seven hundred sixty-four thousand, eight hundred sixty-one".