37840139 has 4 divisors (see below), whose sum is σ = 37977024. Its totient is φ = 37703256.

The previous prime is 37840111. The next prime is 37840141. The reversal of 37840139 is 93104873.

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 37840139 - 2²⁰ = 36791563 is a prime.

It is a super-2 number, since 2×37840139² = 2863752239078642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 37840099 and 37840108.

It is not an unprimeable number, because it can be changed into a prime (37840339) 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, 68027 + ... + 68580.

It is an arithmetic number, because the mean of its divisors is an integer number (9494256).

Almost surely, 2^37840139 is an apocalyptic number.

37840139 is a deficient number, since it is larger than the sum of its proper divisors (136885).

37840139 is a wasteful number, since it uses less digits than its factorization.

37840139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136884.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 37840139 is about 6151.4338978810. The cubic root of 37840139 is about 335.7254317539.

The spelling of 37840139 in words is "thirty-seven million, eight hundred forty thousand, one hundred thirty-nine".