921013724 has 6 divisors (see below), whose sum is σ = 1611774024. Its totient is φ = 460506860.

The previous prime is 921013721. The next prime is 921013759. The reversal of 921013724 is 427310129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921013721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115126712 + ... + 115126719.

It is an arithmetic number, because the mean of its divisors is an integer number (268629004).

Almost surely, 2^921013724 is an apocalyptic number.

It is an amenable number.

921013724 is a deficient number, since it is larger than the sum of its proper divisors (690760300).

921013724 is a wasteful number, since it uses less digits than its factorization.

921013724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230253435 (or 230253433 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 921013724 is about 30348.2079207323. The cubic root of 921013724 is about 972.9459185126.

The spelling of 921013724 in words is "nine hundred twenty-one million, thirteen thousand, seven hundred twenty-four".