137977771 has 2 divisors, whose sum is σ = 137977772. Its totient is φ = 137977770.

The previous prime is 137977739. The next prime is 137977799. The reversal of 137977771 is 177779731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137977771 - 2⁵ = 137977739 is a prime.

It is not a weakly prime, because it can be changed into another prime (137977711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68988885 + 68988886.

It is an arithmetic number, because the mean of its divisors is an integer number (68988886).

Almost surely, 2^137977771 is an apocalyptic number.

137977771 is a deficient number, since it is larger than the sum of its proper divisors (1).

137977771 is an equidigital number, since it uses as much as digits as its factorization.

137977771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453789, while the sum is 49.

The square root of 137977771 is about 11746.3939572960. The cubic root of 137977771 is about 516.7371769650.

The spelling of 137977771 in words is "one hundred thirty-seven million, nine hundred seventy-seven thousand, seven hundred seventy-one".