137929213 has 4 divisors (see below), whose sum is σ = 138003228. Its totient is φ = 137855200.

The previous prime is 137929159. The next prime is 137929241. The reversal of 137929213 is 312929731.

It is a happy number.

137929213 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 can be written as a sum of positive squares in 2 ways, for example, as 73239364 + 64689849 = 8558^2 + 8043^2 .

It is a cyclic number.

It is not a de Polignac number, because 137929213 - 2²¹ = 135832061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137929273) 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, 34138 + ... + 37963.

It is an arithmetic number, because the mean of its divisors is an integer number (34500807).

Almost surely, 2^137929213 is an apocalyptic number.

It is an amenable number.

137929213 is a deficient number, since it is larger than the sum of its proper divisors (74015).

137929213 is an equidigital number, since it uses as much as digits as its factorization.

137929213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74014.

The product of its digits is 20412, while the sum is 37.

The square root of 137929213 is about 11744.3268432039. The cubic root of 137929213 is about 516.6765520597.

It can be divided in two parts, 13792 and 9213, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 137929213 in words is "one hundred thirty-seven million, nine hundred twenty-nine thousand, two hundred thirteen".