138762499 has 2 divisors, whose sum is σ = 138762500. Its totient is φ = 138762498.

The previous prime is 138762497. The next prime is 138762511. The reversal of 138762499 is 994267831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138762499 - 2¹ = 138762497 is a prime.

It is a super-2 number, since 2×138762499² = 38510062257450002, which contains 22 as substring.

Together with 138762497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (138762493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69381249 + 69381250.

It is an arithmetic number, because the mean of its divisors is an integer number (69381250).

Almost surely, 2^138762499 is an apocalyptic number.

138762499 is a deficient number, since it is larger than the sum of its proper divisors (1).

138762499 is an equidigital number, since it uses as much as digits as its factorization.

138762499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 138762499 is about 11779.7495304442. The cubic root of 138762499 is about 517.7149475423.

The spelling of 138762499 in words is "one hundred thirty-eight million, seven hundred sixty-two thousand, four hundred ninety-nine".