37138709 has 2 divisors, whose sum is σ = 37138710. Its totient is φ = 37138708.

The previous prime is 37138679. The next prime is 37138757. The reversal of 37138709 is 90783173.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36264484 + 874225 = 6022^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 37138709 - 2²⁴ = 20361493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37134709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18569354 + 18569355.

It is an arithmetic number, because the mean of its divisors is an integer number (18569355).

Almost surely, 2^37138709 is an apocalyptic number.

It is an amenable number.

37138709 is a deficient number, since it is larger than the sum of its proper divisors (1).

37138709 is an equidigital number, since it uses as much as digits as its factorization.

37138709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 37138709 is about 6094.1536738090. The cubic root of 37138709 is about 333.6380705430.

The spelling of 37138709 in words is "thirty-seven million, one hundred thirty-eight thousand, seven hundred nine".