137698381 has 2 divisors, whose sum is σ = 137698382. Its totient is φ = 137698380.

The previous prime is 137698369. The next prime is 137698417. The reversal of 137698381 is 183896731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100902025 + 36796356 = 10045^2 + 6066^2 .

It is an emirp because it is prime and its reverse (183896731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137698381 is a prime.

It is a super-2 number, since 2×137698381² = 37921688260042322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137698321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68849190 + 68849191.

It is an arithmetic number, because the mean of its divisors is an integer number (68849191).

Almost surely, 2^137698381 is an apocalyptic number.

It is an amenable number.

137698381 is a deficient number, since it is larger than the sum of its proper divisors (1).

137698381 is an equidigital number, since it uses as much as digits as its factorization.

137698381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 137698381 is about 11734.4953449222. The cubic root of 137698381 is about 516.3881624004.

The spelling of 137698381 in words is "one hundred thirty-seven million, six hundred ninety-eight thousand, three hundred eighty-one".