137042813 has 4 divisors (see below), whose sum is σ = 137184060. Its totient is φ = 136901568.

The previous prime is 137042791. The next prime is 137042821. The reversal of 137042813 is 318240731.

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 64673764 + 72369049 = 8042^2 + 8507^2 .

It is a cyclic number.

It is not a de Polignac number, because 137042813 - 2¹⁰ = 137041789 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 (137042833) 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, 69158 + ... + 71111.

It is an arithmetic number, because the mean of its divisors is an integer number (34296015).

Almost surely, 2^137042813 is an apocalyptic number.

It is an amenable number.

137042813 is a deficient number, since it is larger than the sum of its proper divisors (141247).

137042813 is an equidigital number, since it uses as much as digits as its factorization.

137042813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141246.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 137042813 is about 11706.5286485790. The cubic root of 137042813 is about 515.5673679229.

The spelling of 137042813 in words is "one hundred thirty-seven million, forty-two thousand, eight hundred thirteen".