37316981 has 4 divisors (see below), whose sum is σ = 40187532. Its totient is φ = 34446432.

The previous prime is 37316953. The next prime is 37317029. The reversal of 37316981 is 18961373.

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 14668900 + 22648081 = 3830^2 + 4759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37316981 is a prime.

It is a super-2 number, since 2×37316981² = 2785114141908722, 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 (37316911) 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, 1435256 + ... + 1435281.

It is an arithmetic number, because the mean of its divisors is an integer number (10046883).

Almost surely, 2^37316981 is an apocalyptic number.

It is an amenable number.

37316981 is a deficient number, since it is larger than the sum of its proper divisors (2870551).

37316981 is a wasteful number, since it uses less digits than its factorization.

37316981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870550.

The product of its digits is 27216, while the sum is 38.

The square root of 37316981 is about 6108.7626406663. The cubic root of 37316981 is about 334.1710581101.

The spelling of 37316981 in words is "thirty-seven million, three hundred sixteen thousand, nine hundred eighty-one".