137526981 has 4 divisors (see below), whose sum is σ = 183369312. Its totient is φ = 91684652.

The previous prime is 137526979. The next prime is 137527003. The reversal of 137526981 is 189625731.

137526981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 137526981 - 2¹ = 137526979 is a prime.

It is a super-2 number, since 2×137526981² = 37827341005948722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137526901) 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, 22921161 + ... + 22921166.

It is an arithmetic number, because the mean of its divisors is an integer number (45842328).

Almost surely, 2^137526981 is an apocalyptic number.

It is an amenable number.

137526981 is a deficient number, since it is larger than the sum of its proper divisors (45842331).

137526981 is an equidigital number, since it uses as much as digits as its factorization.

137526981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45842330.

The product of its digits is 90720, while the sum is 42.

The square root of 137526981 is about 11727.1898168317. The cubic root of 137526981 is about 516.1738154594.

The spelling of 137526981 in words is "one hundred thirty-seven million, five hundred twenty-six thousand, nine hundred eighty-one".