137778677 has 2 divisors, whose sum is σ = 137778678. Its totient is φ = 137778676.

The previous prime is 137778583. The next prime is 137778691. The reversal of 137778677 is 776877731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76720081 + 61058596 = 8759^2 + 7814^2 .

It is a cyclic number.

It is not a de Polignac number, because 137778677 - 2²⁶ = 70669813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137774677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68889338 + 68889339.

It is an arithmetic number, because the mean of its divisors is an integer number (68889339).

Almost surely, 2^137778677 is an apocalyptic number.

It is an amenable number.

137778677 is a deficient number, since it is larger than the sum of its proper divisors (1).

137778677 is an equidigital number, since it uses as much as digits as its factorization.

137778677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2420208, while the sum is 53.

The square root of 137778677 is about 11737.9162120029. The cubic root of 137778677 is about 516.4885166350.

The spelling of 137778677 in words is "one hundred thirty-seven million, seven hundred seventy-eight thousand, six hundred seventy-seven".