37407661 has 2 divisors, whose sum is σ = 37407662. Its totient is φ = 37407660.

The previous prime is 37407659. The next prime is 37407697. The reversal of 37407661 is 16670473.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30085225 + 7322436 = 5485^2 + 2706^2 .

It is an emirp because it is prime and its reverse (16670473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37407661 - 2¹ = 37407659 is a prime.

Together with 37407659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37407611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18703830 + 18703831.

It is an arithmetic number, because the mean of its divisors is an integer number (18703831).

Almost surely, 2^37407661 is an apocalyptic number.

It is an amenable number.

37407661 is a deficient number, since it is larger than the sum of its proper divisors (1).

37407661 is an equidigital number, since it uses as much as digits as its factorization.

37407661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 37407661 is about 6116.1802622225. The cubic root of 37407661 is about 334.4415169268.

The spelling of 37407661 in words is "thirty-seven million, four hundred seven thousand, six hundred sixty-one".