139952997 has 12 divisors (see below), whose sum is σ = 202421440. Its totient is φ = 93178728.

The previous prime is 139952987. The next prime is 139953007. The reversal of 139952997 is 799259931.

It is an interprime number because it is at equal distance from previous prime (139952987) and next prime (139953007).

It is not a de Polignac number, because 139952997 - 2¹² = 139948901 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 (139952987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2797 + ... + 16962.

Almost surely, 2^139952997 is an apocalyptic number.

It is an amenable number.

139952997 is a deficient number, since it is larger than the sum of its proper divisors (62468443).

139952997 is a wasteful number, since it uses less digits than its factorization.

139952997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20552 (or 20549 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 54.

The square root of 139952997 is about 11830.1731601866. The cubic root of 139952997 is about 519.1912934901.

The spelling of 139952997 in words is "one hundred thirty-nine million, nine hundred fifty-two thousand, nine hundred ninety-seven".