921148023 has 4 divisors (see below), whose sum is σ = 1228197368. Its totient is φ = 614098680.

The previous prime is 921148013. The next prime is 921148057. The reversal of 921148023 is 320841129.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 921148023 - 2¹⁷ = 921016951 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 (921148013) 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, 153524668 + ... + 153524673.

It is an arithmetic number, because the mean of its divisors is an integer number (307049342).

Almost surely, 2^921148023 is an apocalyptic number.

921148023 is a deficient number, since it is larger than the sum of its proper divisors (307049345).

921148023 is a wasteful number, since it uses less digits than its factorization.

921148023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307049344.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 921148023 is about 30350.4204748468. The cubic root of 921148023 is about 972.9932067379.

The spelling of 921148023 in words is "nine hundred twenty-one million, one hundred forty-eight thousand, twenty-three".