137661725 has 12 divisors (see below), whose sum is σ = 172759776. Its totient is φ = 108800880.

The previous prime is 137661701. The next prime is 137661749. The reversal of 137661725 is 527166731.

It is an interprime number because it is at equal distance from previous prime (137661701) and next prime (137661749).

It is not a de Polignac number, because 137661725 - 2⁶ = 137661661 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31097 + ... + 35246.

It is an arithmetic number, because the mean of its divisors is an integer number (14396648).

Almost surely, 2^137661725 is an apocalyptic number.

It is an amenable number.

137661725 is a deficient number, since it is larger than the sum of its proper divisors (35098051).

137661725 is an equidigital number, since it uses as much as digits as its factorization.

137661725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66436 (or 66431 counting only the distinct ones).

The product of its digits is 52920, while the sum is 38.

The square root of 137661725 is about 11732.9333501900. The cubic root of 137661725 is about 516.3423366272.

The spelling of 137661725 in words is "one hundred thirty-seven million, six hundred sixty-one thousand, seven hundred twenty-five".