37161381 has 4 divisors (see below), whose sum is σ = 49548512. Its totient is φ = 24774252.

The previous prime is 37161373. The next prime is 37161391. The reversal of 37161381 is 18316173.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18316173 = 3 ⋅6105391.

It is not a de Polignac number, because 37161381 - 2³ = 37161373 is a prime.

It is a super-2 number, since 2×37161381² = 2761936475654322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37161301) 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, 6193561 + ... + 6193566.

It is an arithmetic number, because the mean of its divisors is an integer number (12387128).

Almost surely, 2^37161381 is an apocalyptic number.

It is an amenable number.

37161381 is a deficient number, since it is larger than the sum of its proper divisors (12387131).

37161381 is a wasteful number, since it uses less digits than its factorization.

37161381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12387130.

The product of its digits is 3024, while the sum is 30.

The square root of 37161381 is about 6096.0135334495. The cubic root of 37161381 is about 333.7059485407.

The spelling of 37161381 in words is "thirty-seven million, one hundred sixty-one thousand, three hundred eighty-one".