68533972 has 12 divisors (see below), whose sum is σ = 129160276. Its totient is φ = 31631040.

The previous prime is 68533939. The next prime is 68533973. The reversal of 68533972 is 27933586.

It can be written as a sum of positive squares in 2 ways, for example, as 4309776 + 64224196 = 2076^2 + 8014^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68533973) 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, 658929 + ... + 659032.

Almost surely, 2^68533972 is an apocalyptic number.

It is an amenable number.

68533972 is a deficient number, since it is larger than the sum of its proper divisors (60626304).

68533972 is a wasteful number, since it uses less digits than its factorization.

68533972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317978 (or 1317976 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 68533972 is about 8278.5247478038. The cubic root of 68533972 is about 409.2311030646.

The spelling of 68533972 in words is "sixty-eight million, five hundred thirty-three thousand, nine hundred seventy-two".