137920919 has 4 divisors (see below), whose sum is σ = 138101040. Its totient is φ = 137740800.

The previous prime is 137920841. The next prime is 137920921. The reversal of 137920919 is 919029731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137920919 - 2⁸ = 137920663 is a prime.

It is a super-2 number, since 2×137920919² = 38044359795609122, 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 (137920969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88907 + ... + 90444.

It is an arithmetic number, because the mean of its divisors is an integer number (34525260).

Almost surely, 2^137920919 is an apocalyptic number.

137920919 is a deficient number, since it is larger than the sum of its proper divisors (180121).

137920919 is an equidigital number, since it uses as much as digits as its factorization.

137920919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180120.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 137920919 is about 11743.9737312377. The cubic root of 137920919 is about 516.6661955366. Note that the first 3 decimals are identical.

The spelling of 137920919 in words is "one hundred thirty-seven million, nine hundred twenty thousand, nine hundred nineteen".