137698705 has 8 divisors (see below), whose sum is σ = 169268904. Its totient is φ = 107472000.

The previous prime is 137698703. The next prime is 137698721. The reversal of 137698705 is 507896731.

It can be written as a sum of positive squares in 4 ways, for example, as 15618304 + 122080401 = 3952^2 + 11049^2 .

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

It is not a de Polignac number, because 137698705 - 2¹ = 137698703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137698703) 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, 335646 + ... + 336055.

It is an arithmetic number, because the mean of its divisors is an integer number (21158613).

Almost surely, 2^137698705 is an apocalyptic number.

It is an amenable number.

137698705 is a deficient number, since it is larger than the sum of its proper divisors (31570199).

137698705 is an equidigital number, since it uses as much as digits as its factorization.

137698705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671747.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 137698705 is about 11734.5091503650. The cubic root of 137698705 is about 516.3885674152.

The spelling of 137698705 in words is "one hundred thirty-seven million, six hundred ninety-eight thousand, seven hundred five".