896972921 has 8 divisors (see below), whose sum is σ = 1022792904. Its totient is φ = 779270400.

The previous prime is 896972911. The next prime is 896972939. The reversal of 896972921 is 129279698.

It can be written as a sum of positive squares in 4 ways, for example, as 192654400 + 704318521 = 13880^2 + 26539^2 .

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 896972921 - 2²² = 892778617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (896972911) 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, 2029130 + ... + 2029571.

It is an arithmetic number, because the mean of its divisors is an integer number (127849113).

Almost surely, 2^896972921 is an apocalyptic number.

It is an amenable number.

896972921 is a deficient number, since it is larger than the sum of its proper divisors (125819983).

896972921 is a wasteful number, since it uses less digits than its factorization.

896972921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058731.

The product of its digits is 979776, while the sum is 53.

The square root of 896972921 is about 29949.5061895852. The cubic root of 896972921 is about 964.4057196292.

The spelling of 896972921 in words is "eight hundred ninety-six million, nine hundred seventy-two thousand, nine hundred twenty-one".