137220079 has 2 divisors, whose sum is σ = 137220080. Its totient is φ = 137220078.

The previous prime is 137220007. The next prime is 137220089. The reversal of 137220079 is 970022731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137220079 - 2¹³ = 137211887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137220079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137220089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68610039 + 68610040.

It is an arithmetic number, because the mean of its divisors is an integer number (68610040).

Almost surely, 2^137220079 is an apocalyptic number.

137220079 is a deficient number, since it is larger than the sum of its proper divisors (1).

137220079 is an equidigital number, since it uses as much as digits as its factorization.

137220079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 137220079 is about 11714.0974470934. The cubic root of 137220079 is about 515.7895690138.

The spelling of 137220079 in words is "one hundred thirty-seven million, two hundred twenty thousand, seventy-nine".