139333988 has 6 divisors (see below), whose sum is σ = 243834486. Its totient is φ = 69666992.

The previous prime is 139333967. The next prime is 139333993. The reversal of 139333988 is 889333931.

It can be written as a sum of positive squares in only one way, i.e., 108951844 + 30382144 = 10438^2 + 5512^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17416745 + ... + 17416752.

It is an arithmetic number, because the mean of its divisors is an integer number (40639081).

Almost surely, 2^139333988 is an apocalyptic number.

It is an amenable number.

139333988 is a deficient number, since it is larger than the sum of its proper divisors (104500498).

139333988 is a wasteful number, since it uses less digits than its factorization.

139333988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34833501 (or 34833499 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 139333988 is about 11803.9818705384. The cubic root of 139333988 is about 518.4247049856.

The spelling of 139333988 in words is "one hundred thirty-nine million, three hundred thirty-three thousand, nine hundred eighty-eight".