137966381 has 8 divisors (see below), whose sum is σ = 158277504. Its totient is φ = 117805680.

The previous prime is 137966363. The next prime is 137966383. The reversal of 137966381 is 183669731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137966381 - 2¹⁰ = 137965357 is a prime.

It is a super-2 number, since 2×137966381² = 38069444572474322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137966383) 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 in 7 ways as a sum of consecutive naturals, for example, 35630 + ... + 39311.

It is an arithmetic number, because the mean of its divisors is an integer number (19784688).

Almost surely, 2^137966381 is an apocalyptic number.

It is an amenable number.

137966381 is a deficient number, since it is larger than the sum of its proper divisors (20311123).

137966381 is an equidigital number, since it uses as much as digits as its factorization.

137966381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75211.

The product of its digits is 163296, while the sum is 44.

The square root of 137966381 is about 11745.9091176460. The cubic root of 137966381 is about 516.7229577702.

The spelling of 137966381 in words is "one hundred thirty-seven million, nine hundred sixty-six thousand, three hundred eighty-one".