137431705 has 8 divisors (see below), whose sum is σ = 165085704. Its totient is φ = 109833600.

The previous prime is 137431699. The next prime is 137431729. The reversal of 137431705 is 507134731.

It can be written as a sum of positive squares in 4 ways, for example, as 60466176 + 76965529 = 7776^2 + 8773^2 .

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

It is not a de Polignac number, because 137431705 - 2⁷ = 137431577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8356 + ... + 18565.

It is an arithmetic number, because the mean of its divisors is an integer number (20635713).

Almost surely, 2^137431705 is an apocalyptic number.

It is an amenable number.

137431705 is a deficient number, since it is larger than the sum of its proper divisors (27653999).

137431705 is a wasteful number, since it uses less digits than its factorization.

137431705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27947.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 137431705 is about 11723.1269292796. The cubic root of 137431705 is about 516.0545895514.

The spelling of 137431705 in words is "one hundred thirty-seven million, four hundred thirty-one thousand, seven hundred five".