137861919 has 48 divisors (see below), whose sum is σ = 224489760. Its totient is φ = 84610656.

The previous prime is 137861897. The next prime is 137861939. The reversal of 137861919 is 919168731.

137861919 is a `hidden beast` number, since 13 + 7 + 8 + 619 + 19 = 666.

It is not a de Polignac number, because 137861919 - 2⁷ = 137861791 is a prime.

It is a super-2 number, since 2×137861919² = 38011817420725122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137861939) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 369417 + ... + 369789.

It is an arithmetic number, because the mean of its divisors is an integer number (4676870).

Almost surely, 2^137861919 is an apocalyptic number.

137861919 is a deficient number, since it is larger than the sum of its proper divisors (86627841).

137861919 is an frugal number, since it uses more digits than its factorization.

137861919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 389 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 137861919 is about 11741.4615359418. The cubic root of 137861919 is about 516.5925116374.

The spelling of 137861919 in words is "one hundred thirty-seven million, eight hundred sixty-one thousand, nine hundred nineteen".