139230536 has 8 divisors (see below), whose sum is σ = 261057270. Its totient is φ = 69615264.

The previous prime is 139230529. The next prime is 139230541. The reversal of 139230536 is 635032931.

It can be written as a sum of positive squares in only one way, i.e., 94206436 + 45024100 = 9706^2 + 6710^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8701901 + ... + 8701916.

Almost surely, 2^139230536 is an apocalyptic number.

It is an amenable number.

139230536 is a deficient number, since it is larger than the sum of its proper divisors (121826734).

139230536 is a wasteful number, since it uses less digits than its factorization.

139230536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17403823 (or 17403819 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 32.

The square root of 139230536 is about 11799.5989762364. The cubic root of 139230536 is about 518.2963674270.

The spelling of 139230536 in words is "one hundred thirty-nine million, two hundred thirty thousand, five hundred thirty-six".