138697335 has 48 divisors (see below), whose sum is σ = 276996096. Its totient is φ = 62887104.

The previous prime is 138697331. The next prime is 138697369. The reversal of 138697335 is 533796831.

It is not a de Polignac number, because 138697335 - 2² = 138697331 is a prime.

It is a super-2 number, since 2×138697335² = 38473901472204450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138697331) 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 47 ways as a sum of consecutive naturals, for example, 38272 + ... + 41738.

It is an arithmetic number, because the mean of its divisors is an integer number (5770752).

Almost surely, 2^138697335 is an apocalyptic number.

138697335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138697335 is a deficient number, since it is larger than the sum of its proper divisors (138298761).

138697335 is a wasteful number, since it uses less digits than its factorization.

138697335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612 (or 3609 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 138697335 is about 11776.9832724684. The cubic root of 138697335 is about 517.6338938008.

The spelling of 138697335 in words is "one hundred thirty-eight million, six hundred ninety-seven thousand, three hundred thirty-five".