747121904 has 20 divisors (see below), whose sum is σ = 1481213976. Its totient is φ = 364873152.

The previous prime is 747121901. The next prime is 747121937. The reversal of 747121904 is 409121747.

It is a super-2 number, since 2×747121904² = 1116382278873170432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747121901) 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, 542279 + ... + 543654.

Almost surely, 2^747121904 is an apocalyptic number.

It is an amenable number.

747121904 is a deficient number, since it is larger than the sum of its proper divisors (734092072).

747121904 is a wasteful number, since it uses less digits than its factorization.

747121904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085984 (or 1085978 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 747121904 is about 27333.5307635146. The cubic root of 747121904 is about 907.3966182855.

The spelling of 747121904 in words is "seven hundred forty-seven million, one hundred twenty-one thousand, nine hundred four".