138752913 has 16 divisors (see below), whose sum is σ = 202212416. Its totient is φ = 84110400.

The previous prime is 138752909. The next prime is 138752917. The reversal of 138752913 is 319257831.

It is an interprime number because it is at equal distance from previous prime (138752909) and next prime (138752917).

It is not a de Polignac number, because 138752913 - 2² = 138752909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138752917) 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 15 ways as a sum of consecutive naturals, for example, 23938 + ... + 29163.

It is an arithmetic number, because the mean of its divisors is an integer number (12638276).

Almost surely, 2^138752913 is an apocalyptic number.

138752913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

138752913 is a deficient number, since it is larger than the sum of its proper divisors (63459503).

138752913 is a wasteful number, since it uses less digits than its factorization.

138752913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53184.

The product of its digits is 45360, while the sum is 39.

The square root of 138752913 is about 11779.3426387044. The cubic root of 138752913 is about 517.7030256619.

The spelling of 138752913 in words is "one hundred thirty-eight million, seven hundred fifty-two thousand, nine hundred thirteen".