137977481 has 2 divisors, whose sum is σ = 137977482. Its totient is φ = 137977480.

The previous prime is 137977471. The next prime is 137977513. The reversal of 137977481 is 184779731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132618256 + 5359225 = 11516^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 137977481 - 2⁶ = 137977417 is a prime.

It is a super-2 number, since 2×137977481² = 38075570526210722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137977451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68988740 + 68988741.

It is an arithmetic number, because the mean of its divisors is an integer number (68988741).

Almost surely, 2^137977481 is an apocalyptic number.

It is an amenable number.

137977481 is a deficient number, since it is larger than the sum of its proper divisors (1).

137977481 is an equidigital number, since it uses as much as digits as its factorization.

137977481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 137977481 is about 11746.3816130756. The cubic root of 137977481 is about 516.7368149407.

The spelling of 137977481 in words is "one hundred thirty-seven million, nine hundred seventy-seven thousand, four hundred eighty-one".