921906572 has 12 divisors (see below), whose sum is σ = 1615490016. Its totient is φ = 460338000.

The previous prime is 921906563. The next prime is 921906577. The reversal of 921906572 is 275609129.

It is not an unprimeable number, because it can be changed into a prime (921906577) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 150443 + ... + 156450.

It is an arithmetic number, because the mean of its divisors is an integer number (134624168).

Almost surely, 2^921906572 is an apocalyptic number.

It is an amenable number.

921906572 is a deficient number, since it is larger than the sum of its proper divisors (693583444).

921906572 is a wasteful number, since it uses less digits than its factorization.

921906572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307648 (or 307646 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 921906572 is about 30362.9144187445. The cubic root of 921906572 is about 973.2602143213.

The spelling of 921906572 in words is "nine hundred twenty-one million, nine hundred six thousand, five hundred seventy-two".