138246837 has 16 divisors (see below), whose sum is σ = 190713792. Its totient is φ = 89009280.

The previous prime is 138246833. The next prime is 138246847. The reversal of 138246837 is 738642831.

It is not a de Polignac number, because 138246837 - 2² = 138246833 is a prime.

It is a super-2 number, since 2×138246837² = 38224375881009138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138246833) 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, 10662 + ... + 19752.

It is an arithmetic number, because the mean of its divisors is an integer number (11919612).

Almost surely, 2^138246837 is an apocalyptic number.

It is an amenable number.

138246837 is a deficient number, since it is larger than the sum of its proper divisors (52466955).

138246837 is a wasteful number, since it uses less digits than its factorization.

138246837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9268.

The product of its digits is 193536, while the sum is 42.

The square root of 138246837 is about 11757.8415110938. The cubic root of 138246837 is about 517.0728496974.

The spelling of 138246837 in words is "one hundred thirty-eight million, two hundred forty-six thousand, eight hundred thirty-seven".