37964981 has 2 divisors, whose sum is σ = 37964982. Its totient is φ = 37964980.

The previous prime is 37964977. The next prime is 37964989. The reversal of 37964981 is 18946973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 9821956 = 5305^2 + 3134^2 .

It is an emirp because it is prime and its reverse (18946973) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37964981 - 2² = 37964977 is a prime.

It is a super-2 number, since 2×37964981² = 2882679564660722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37964989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18982490 + 18982491.

It is an arithmetic number, because the mean of its divisors is an integer number (18982491).

Almost surely, 2^37964981 is an apocalyptic number.

It is an amenable number.

37964981 is a deficient number, since it is larger than the sum of its proper divisors (1).

37964981 is an equidigital number, since it uses as much as digits as its factorization.

37964981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 37964981 is about 6161.5729322958. The cubic root of 37964981 is about 336.0942343632.

The spelling of 37964981 in words is "thirty-seven million, nine hundred sixty-four thousand, nine hundred eighty-one".