1047922921 has 4 divisors (see below), whose sum is σ = 1049440144. Its totient is φ = 1046405700.

The previous prime is 1047922919. The next prime is 1047922933. The reversal of 1047922921 is 1292297401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1047922921 - 2¹ = 1047922919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1047922901) 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, 757575 + ... + 758956.

It is an arithmetic number, because the mean of its divisors is an integer number (262360036).

Almost surely, 2^1047922921 is an apocalyptic number.

It is an amenable number.

1047922921 is a deficient number, since it is larger than the sum of its proper divisors (1517223).

1047922921 is an equidigital number, since it uses as much as digits as its factorization.

1047922921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517222.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1047922921 is about 32371.6376014560. The cubic root of 1047922921 is about 1015.7257126490.

The spelling of 1047922921 in words is "one billion, forty-seven million, nine hundred twenty-two thousand, nine hundred twenty-one".