721467974 has 16 divisors (see below), whose sum is σ = 1133697600. Its totient is φ = 343883904.

The previous prime is 721467973. The next prime is 721467977. The reversal of 721467974 is 479764127.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721467973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74147 + ... + 83310.

It is an arithmetic number, because the mean of its divisors is an integer number (70856100).

Almost surely, 2^721467974 is an apocalyptic number.

721467974 is a deficient number, since it is larger than the sum of its proper divisors (412229626).

721467974 is a wasteful number, since it uses less digits than its factorization.

721467974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157567.

The product of its digits is 592704, while the sum is 47.

The square root of 721467974 is about 26860.1558819006. The cubic root of 721467974 is about 896.8896641065.

The spelling of 721467974 in words is "seven hundred twenty-one million, four hundred sixty-seven thousand, nine hundred seventy-four".