137977799 has 2 divisors, whose sum is σ = 137977800. Its totient is φ = 137977798.

The previous prime is 137977771. The next prime is 137977843. The reversal of 137977799 is 997779731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137977799 - 2²⁰ = 136929223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137977739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68988899 + 68988900.

It is an arithmetic number, because the mean of its divisors is an integer number (68988900).

Almost surely, 2^137977799 is an apocalyptic number.

137977799 is a deficient number, since it is larger than the sum of its proper divisors (1).

137977799 is an equidigital number, since it uses as much as digits as its factorization.

137977799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5250987, while the sum is 59.

The square root of 137977799 is about 11746.3951491511. The cubic root of 137977799 is about 516.7372119190.

The spelling of 137977799 in words is "one hundred thirty-seven million, nine hundred seventy-seven thousand, seven hundred ninety-nine".