137505705 has 8 divisors (see below), whose sum is σ = 220009152. Its totient is φ = 73336368.

The previous prime is 137505689. The next prime is 137505713. The reversal of 137505705 is 507505731.

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

It is not a de Polignac number, because 137505705 - 2⁴ = 137505689 is a prime.

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, 4583509 + ... + 4583538.

It is an arithmetic number, because the mean of its divisors is an integer number (27501144).

Almost surely, 2^137505705 is an apocalyptic number.

137505705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

137505705 is a deficient number, since it is larger than the sum of its proper divisors (82503447).

137505705 is an equidigital number, since it uses as much as digits as its factorization.

137505705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9167055.

The product of its (nonzero) digits is 18375, while the sum is 33.

The square root of 137505705 is about 11726.2826590527. The cubic root of 137505705 is about 516.1471960029.

The spelling of 137505705 in words is "one hundred thirty-seven million, five hundred five thousand, seven hundred five".