921097071 has 6 divisors (see below), whose sum is σ = 1330473560. Its totient is φ = 614064708.

The previous prime is 921097057. The next prime is 921097087. The reversal of 921097071 is 170790129.

It is not a de Polignac number, because 921097071 - 2⁶ = 921097007 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 (921097571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51172051 + ... + 51172068.

Almost surely, 2^921097071 is an apocalyptic number.

921097071 is a deficient number, since it is larger than the sum of its proper divisors (409376489).

921097071 is a wasteful number, since it uses less digits than its factorization.

921097071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102344125 (or 102344122 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 921097071 is about 30349.5810679489. The cubic root of 921097071 is about 972.9752664928.

The spelling of 921097071 in words is "nine hundred twenty-one million, ninety-seven thousand, seventy-one".