138670497387 has 24 divisors (see below), whose sum is σ = 206955541728. Its totient is φ = 89425190400.

The previous prime is 138670497349. The next prime is 138670497391. The reversal of 138670497387 is 783794076831.

138670497387 is a `hidden beast` number, since 1 + 3 + 8 + 67 + 0 + 497 + 3 + 87 = 666.

It is not a de Polignac number, because 138670497387 - 2¹¹ = 138670495339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138670497337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2013414 + ... + 2081147.

It is an arithmetic number, because the mean of its divisors is an integer number (8623147572).

Almost surely, 2^138670497387 is an apocalyptic number.

138670497387 is a deficient number, since it is larger than the sum of its proper divisors (68285044341).

138670497387 is a wasteful number, since it uses less digits than its factorization.

138670497387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094691 (or 4094688 counting only the distinct ones).

The product of its (nonzero) digits is 42674688, while the sum is 63.

The spelling of 138670497387 in words is "one hundred thirty-eight billion, six hundred seventy million, four hundred ninety-seven thousand, three hundred eighty-seven".