921136923 has 24 divisors (see below), whose sum is σ = 1530828000. Its totient is φ = 522825984.

The previous prime is 921136901. The next prime is 921136933. The reversal of 921136923 is 329631129.

It is a happy number.

It is not a de Polignac number, because 921136923 - 2¹⁶ = 921071387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (921136933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39678 + ... + 58451.

It is an arithmetic number, because the mean of its divisors is an integer number (63784500).

Almost surely, 2^921136923 is an apocalyptic number.

921136923 is a deficient number, since it is larger than the sum of its proper divisors (609691077).

921136923 is a wasteful number, since it uses less digits than its factorization.

921136923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98291 (or 98288 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 921136923 is about 30350.2376102725. The cubic root of 921136923 is about 972.9892984743.

The spelling of 921136923 in words is "nine hundred twenty-one million, one hundred thirty-six thousand, nine hundred twenty-three".