137409739 has 2 divisors, whose sum is σ = 137409740. Its totient is φ = 137409738.

The previous prime is 137409709. The next prime is 137409757. The reversal of 137409739 is 937904731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137409739 - 2⁷ = 137409611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137409695 and 137409704.

It is not a weakly prime, because it can be changed into another prime (137409709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68704869 + 68704870.

It is an arithmetic number, because the mean of its divisors is an integer number (68704870).

Almost surely, 2^137409739 is an apocalyptic number.

137409739 is a deficient number, since it is larger than the sum of its proper divisors (1).

137409739 is an equidigital number, since it uses as much as digits as its factorization.

137409739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 137409739 is about 11722.1900257588. The cubic root of 137409739 is about 516.0270940544.

The spelling of 137409739 in words is "one hundred thirty-seven million, four hundred nine thousand, seven hundred thirty-nine".