137676421 has 12 divisors (see below), whose sum is σ = 146715300. Its totient is φ = 129167360.

The previous prime is 137676397. The next prime is 137676437. The reversal of 137676421 is 124676731.

It can be written as a sum of positive squares in 6 ways, for example, as 24147396 + 113529025 = 4914^2 + 10655^2 .

It is not a de Polignac number, because 137676421 - 2⁵ = 137676389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137676481) 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 11 ways as a sum of consecutive naturals, for example, 129231 + ... + 130291.

It is an arithmetic number, because the mean of its divisors is an integer number (12226275).

Almost surely, 2^137676421 is an apocalyptic number.

It is an amenable number.

137676421 is a deficient number, since it is larger than the sum of its proper divisors (9038879).

137676421 is a wasteful number, since it uses less digits than its factorization.

137676421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544 (or 1527 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 137676421 is about 11733.5596048258. The cubic root of 137676421 is about 516.3607099186.

The spelling of 137676421 in words is "one hundred thirty-seven million, six hundred seventy-six thousand, four hundred twenty-one".