921150772 has 24 divisors (see below), whose sum is σ = 1653309000. Its totient is φ = 448803840.

The previous prime is 921150757. The next prime is 921150787. The reversal of 921150772 is 277051129.

It is an interprime number because it is at equal distance from previous prime (921150757) and next prime (921150787).

It can be written as a sum of positive squares in 4 ways, for example, as 2090916 + 919059856 = 1446^2 + 30316^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157354 + ... + 163102.

It is an arithmetic number, because the mean of its divisors is an integer number (68887875).

Almost surely, 2^921150772 is an apocalyptic number.

It is an amenable number.

921150772 is a deficient number, since it is larger than the sum of its proper divisors (732158228).

921150772 is a wasteful number, since it uses less digits than its factorization.

921150772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771 (or 6769 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 921150772 is about 30350.4657624887. The cubic root of 921150772 is about 972.9941746445.

The spelling of 921150772 in words is "nine hundred twenty-one million, one hundred fifty thousand, seven hundred seventy-two".