139797459 has 12 divisors (see below), whose sum is σ = 212557800. Its totient is φ = 88293024.

The previous prime is 139797457. The next prime is 139797479. The reversal of 139797459 is 954797931.

It is a happy number.

139797459 is a `hidden beast` number, since 13 + 97 + 97 + 459 = 666.

It is not a de Polignac number, because 139797459 - 2¹ = 139797457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139797451) 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, 408594 + ... + 408935.

It is an arithmetic number, because the mean of its divisors is an integer number (17713150).

Almost surely, 2^139797459 is an apocalyptic number.

139797459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139797459 is a deficient number, since it is larger than the sum of its proper divisors (72760341).

139797459 is a wasteful number, since it uses less digits than its factorization.

139797459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817554 (or 817551 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 139797459 is about 11823.5975489696. The cubic root of 139797459 is about 518.9988862506.

The spelling of 139797459 in words is "one hundred thirty-nine million, seven hundred ninety-seven thousand, four hundred fifty-nine".