37981033 has 2 divisors, whose sum is σ = 37981034. Its totient is φ = 37981032.

The previous prime is 37981007. The next prime is 37981051. The reversal of 37981033 is 33018973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37295449 + 685584 = 6107^2 + 828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37981033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 37981033.

It is not a weakly prime, because it can be changed into another prime (37981003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18990516 + 18990517.

It is an arithmetic number, because the mean of its divisors is an integer number (18990517).

Almost surely, 2^37981033 is an apocalyptic number.

It is an amenable number.

37981033 is a deficient number, since it is larger than the sum of its proper divisors (1).

37981033 is an equidigital number, since it uses as much as digits as its factorization.

37981033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 37981033 is about 6162.8753841044. The cubic root of 37981033 is about 336.1415957678.

The spelling of 37981033 in words is "thirty-seven million, nine hundred eighty-one thousand, thirty-three".