137248981 has 4 divisors (see below), whose sum is σ = 143216352. Its totient is φ = 131281612.

The previous prime is 137248957. The next prime is 137248999. The reversal of 137248981 is 189842731.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137248981 is a prime.

It is a super-2 number, since 2×137248981² = 37674565571076722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137248901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2983651 + ... + 2983696.

It is an arithmetic number, because the mean of its divisors is an integer number (35804088).

Almost surely, 2^137248981 is an apocalyptic number.

It is an amenable number.

137248981 is a deficient number, since it is larger than the sum of its proper divisors (5967371).

137248981 is an equidigital number, since it uses as much as digits as its factorization.

137248981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967370.

The product of its digits is 96768, while the sum is 43.

The square root of 137248981 is about 11715.3310239190. The cubic root of 137248981 is about 515.8257792238.

The spelling of 137248981 in words is "one hundred thirty-seven million, two hundred forty-eight thousand, nine hundred eighty-one".