137538719 has 4 divisors (see below), whose sum is σ = 139195896. Its totient is φ = 135881544.

The previous prime is 137538697. The next prime is 137538727. The reversal of 137538719 is 917835731.

137538719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 137538719 - 2¹⁶ = 137473183 is a prime.

It is a super-2 number, since 2×137538719² = 37833798448321922, which contains 22 as substring.

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 137538719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137538769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828464 + ... + 828629.

It is an arithmetic number, because the mean of its divisors is an integer number (34798974).

Almost surely, 2^137538719 is an apocalyptic number.

137538719 is a deficient number, since it is larger than the sum of its proper divisors (1657177).

137538719 is an equidigital number, since it uses as much as digits as its factorization.

137538719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657176.

The product of its digits is 158760, while the sum is 44.

The square root of 137538719 is about 11727.6902670560. The cubic root of 137538719 is about 516.1885002769.

The spelling of 137538719 in words is "one hundred thirty-seven million, five hundred thirty-eight thousand, seven hundred nineteen".