921752901 has 12 divisors (see below), whose sum is σ = 1334302528. Its totient is φ = 613171944.

The previous prime is 921752863. The next prime is 921752911. The reversal of 921752901 is 109257129.

It is not a de Polignac number, because 921752901 - 2⁶ = 921752837 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 (921752911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106435 + ... + 114768.

Almost surely, 2^921752901 is an apocalyptic number.

It is an amenable number.

921752901 is a deficient number, since it is larger than the sum of its proper divisors (412549627).

921752901 is a wasteful number, since it uses less digits than its factorization.

921752901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221672 (or 221669 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 921752901 is about 30360.3837426341. The cubic root of 921752901 is about 973.2061343000.

The spelling of 921752901 in words is "nine hundred twenty-one million, seven hundred fifty-two thousand, nine hundred one".