137779381 has 8 divisors (see below), whose sum is σ = 139379328. Its totient is φ = 136188000.

The previous prime is 137779363. The next prime is 137779409. The reversal of 137779381 is 183977731.

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 137779381 - 2⁵ = 137779349 is a prime.

It is a super-2 number, since 2×137779381² = 37966315657486322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137779321) 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, 33561 + ... + 37441.

It is an arithmetic number, because the mean of its divisors is an integer number (17422416).

Almost surely, 2^137779381 is an apocalyptic number.

It is an amenable number.

137779381 is a deficient number, since it is larger than the sum of its proper divisors (1599947).

137779381 is a wasteful number, since it uses less digits than its factorization.

137779381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283.

The product of its digits is 222264, while the sum is 46.

The square root of 137779381 is about 11737.9462002516. The cubic root of 137779381 is about 516.4893963244.

The spelling of 137779381 in words is "one hundred thirty-seven million, seven hundred seventy-nine thousand, three hundred eighty-one".