137749919 has 2 divisors, whose sum is σ = 137749920. Its totient is φ = 137749918.

The previous prime is 137749907. The next prime is 137749933. The reversal of 137749919 is 919947731.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137749919 - 2⁸ = 137749663 is a prime.

It is a super-2 number, since 2×137749919² = 37950080369013122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137749319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68874959 + 68874960.

It is an arithmetic number, because the mean of its divisors is an integer number (68874960).

Almost surely, 2^137749919 is an apocalyptic number.

137749919 is a deficient number, since it is larger than the sum of its proper divisors (1).

137749919 is an equidigital number, since it uses as much as digits as its factorization.

137749919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 50.

The square root of 137749919 is about 11736.6911435890. The cubic root of 137749919 is about 516.4525792640.

The spelling of 137749919 in words is "one hundred thirty-seven million, seven hundred forty-nine thousand, nine hundred nineteen".