137371861 has 16 divisors (see below), whose sum is σ = 154879488. Its totient is φ = 120744000.

The previous prime is 137371837. The next prime is 137371867. The reversal of 137371861 is 168173731.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 137371861 - 2⁷ = 137371733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137371861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137371867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69436 + ... + 71386.

It is an arithmetic number, because the mean of its divisors is an integer number (9679968).

Almost surely, 2^137371861 is an apocalyptic number.

137371861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

137371861 is a deficient number, since it is larger than the sum of its proper divisors (17507627).

137371861 is a wasteful number, since it uses less digits than its factorization.

137371861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172.

The product of its digits is 21168, while the sum is 37.

The square root of 137371861 is about 11720.5742606751. The cubic root of 137371861 is about 515.9796741488.

The spelling of 137371861 in words is "one hundred thirty-seven million, three hundred seventy-one thousand, eight hundred sixty-one".