139288901 has 4 divisors (see below), whose sum is σ = 140385792. Its totient is φ = 138192012.

The previous prime is 139288873. The next prime is 139288909. The reversal of 139288901 is 109882931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139288901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139288909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548255 + ... + 548508.

It is an arithmetic number, because the mean of its divisors is an integer number (35096448).

Almost surely, 2^139288901 is an apocalyptic number.

It is an amenable number.

139288901 is a deficient number, since it is larger than the sum of its proper divisors (1096891).

139288901 is a wasteful number, since it uses less digits than its factorization.

139288901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096890.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 139288901 is about 11802.0718943752. The cubic root of 139288901 is about 518.3687800418.

The spelling of 139288901 in words is "one hundred thirty-nine million, two hundred eighty-eight thousand, nine hundred one".