137699819 has 2 divisors, whose sum is σ = 137699820. Its totient is φ = 137699818.

The previous prime is 137699767. The next prime is 137699843. The reversal of 137699819 is 918996731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137699819 - 2⁸ = 137699563 is a prime.

It is a super-2 number, since 2×137699819² = 37922480305265522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (137699119) 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 as a sum of consecutive naturals, namely, 68849909 + 68849910.

It is an arithmetic number, because the mean of its divisors is an integer number (68849910).

Almost surely, 2^137699819 is an apocalyptic number.

137699819 is a deficient number, since it is larger than the sum of its proper divisors (1).

137699819 is an equidigital number, since it uses as much as digits as its factorization.

137699819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 53.

The square root of 137699819 is about 11734.5566171032. The cubic root of 137699819 is about 516.3899599611.

The spelling of 137699819 in words is "one hundred thirty-seven million, six hundred ninety-nine thousand, eight hundred nineteen".