921204971 has 4 divisors (see below), whose sum is σ = 922397472. Its totient is φ = 920012472.

The previous prime is 921204943. The next prime is 921204983. The reversal of 921204971 is 179402129.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 921204971 - 2²⁶ = 854096107 is a prime.

It is a super-2 number, since 2×921204971² = 1697237197190221682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921204931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595091 + ... + 596636.

It is an arithmetic number, because the mean of its divisors is an integer number (230599368).

Almost surely, 2^921204971 is an apocalyptic number.

921204971 is a deficient number, since it is larger than the sum of its proper divisors (1192501).

921204971 is a wasteful number, since it uses less digits than its factorization.

921204971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192500.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 921204971 is about 30351.3586351583. The cubic root of 921204971 is about 973.0132573971.

The spelling of 921204971 in words is "nine hundred twenty-one million, two hundred four thousand, nine hundred seventy-one".