921957147 has 10 divisors (see below), whose sum is σ = 1377244748. Its totient is φ = 614638044.

The previous prime is 921957133. The next prime is 921957167. The reversal of 921957147 is 741759129.

It is not a de Polignac number, because 921957147 - 2⁴ = 921957131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921957167) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5691013 + ... + 5691174.

Almost surely, 2^921957147 is an apocalyptic number.

921957147 is a deficient number, since it is larger than the sum of its proper divisors (455287601).

921957147 is a wasteful number, since it uses less digits than its factorization.

921957147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11382199 (or 11382190 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 921957147 is about 30363.7472489810. The cubic root of 921957147 is about 973.2780114014.

It can be divided in two parts, 9219 and 57147, that added together give a palindrome (66366).

The spelling of 921957147 in words is "nine hundred twenty-one million, nine hundred fifty-seven thousand, one hundred forty-seven".