97139399 has 16 divisors (see below), whose sum is σ = 115138560. Its totient is φ = 80196480.

The previous prime is 97139387. The next prime is 97139401. The reversal of 97139399 is 99393179.

It is a happy number.

It is not a de Polignac number, because 97139399 - 2¹² = 97135303 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 (97139099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50927 + ... + 52799.

It is an arithmetic number, because the mean of its divisors is an integer number (7196160).

Almost surely, 2^97139399 is an apocalyptic number.

97139399 is a deficient number, since it is larger than the sum of its proper divisors (17999161).

97139399 is a wasteful number, since it uses less digits than its factorization.

97139399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150.

The product of its digits is 413343, while the sum is 50.

The square root of 97139399 is about 9855.9321730621. The cubic root of 97139399 is about 459.6900858305.

The spelling of 97139399 in words is "ninety-seven million, one hundred thirty-nine thousand, three hundred ninety-nine".