137280857 has 4 divisors (see below), whose sum is σ = 156892416. Its totient is φ = 117669300.

The previous prime is 137280853. The next prime is 137280877. The reversal of 137280857 is 758082731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 758082731 = 7 ⋅108297533.

It is not a de Polignac number, because 137280857 - 2² = 137280853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137280851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9805769 + ... + 9805782.

It is an arithmetic number, because the mean of its divisors is an integer number (39223104).

Almost surely, 2^137280857 is an apocalyptic number.

It is an amenable number.

137280857 is a deficient number, since it is larger than the sum of its proper divisors (19611559).

137280857 is an equidigital number, since it uses as much as digits as its factorization.

137280857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19611558.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 137280857 is about 11716.6913845164. The cubic root of 137280857 is about 515.8657095501.

The spelling of 137280857 in words is "one hundred thirty-seven million, two hundred eighty thousand, eight hundred fifty-seven".