37940561 has 2 divisors, whose sum is σ = 37940562. Its totient is φ = 37940560.

The previous prime is 37940557. The next prime is 37940603. The reversal of 37940561 is 16504973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24690961 + 13249600 = 4969^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 37940561 - 2² = 37940557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (37940521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18970280 + 18970281.

It is an arithmetic number, because the mean of its divisors is an integer number (18970281).

Almost surely, 2^37940561 is an apocalyptic number.

It is an amenable number.

37940561 is a deficient number, since it is larger than the sum of its proper divisors (1).

37940561 is an equidigital number, since it uses as much as digits as its factorization.

37940561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 37940561 is about 6159.5909766802. The cubic root of 37940561 is about 336.0221575760.

The spelling of 37940561 in words is "thirty-seven million, nine hundred forty thousand, five hundred sixty-one".