139284968 has 8 divisors (see below), whose sum is σ = 261159330. Its totient is φ = 69642480.

The previous prime is 139284947. The next prime is 139284973. The reversal of 139284968 is 869482931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 106543684 + 32741284 = 10322^2 + 5722^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×139284968² = 38800604621522048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8705303 + ... + 8705318.

Almost surely, 2^139284968 is an apocalyptic number.

It is an amenable number.

139284968 is a deficient number, since it is larger than the sum of its proper divisors (121874362).

139284968 is a wasteful number, since it uses less digits than its factorization.

139284968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17410627 (or 17410623 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 139284968 is about 11801.9052699130. The cubic root of 139284968 is about 518.3639010611.

The spelling of 139284968 in words is "one hundred thirty-nine million, two hundred eighty-four thousand, nine hundred sixty-eight".