137685751 has 8 divisors (see below), whose sum is σ = 164196864. Its totient is φ = 112885080.

The previous prime is 137685733. The next prime is 137685809. The reversal of 137685751 is 157586731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137685751 - 2⁷ = 137685623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137685698 and 137685707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137685451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427435 + ... + 427756.

It is an arithmetic number, because the mean of its divisors is an integer number (20524608).

Almost surely, 2^137685751 is an apocalyptic number.

137685751 is a deficient number, since it is larger than the sum of its proper divisors (26511113).

137685751 is an equidigital number, since it uses as much as digits as its factorization.

137685751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855221.

The product of its digits is 176400, while the sum is 43.

The square root of 137685751 is about 11733.9571756505. The cubic root of 137685751 is about 516.3723738297.

The spelling of 137685751 in words is "one hundred thirty-seven million, six hundred eighty-five thousand, seven hundred fifty-one".