37661201 has 2 divisors, whose sum is σ = 37661202. Its totient is φ = 37661200.

The previous prime is 37661101. The next prime is 37661203. The reversal of 37661201 is 10216673.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 17230801 = 4520^2 + 4151^2 .

It is a cyclic number.

It is not a de Polignac number, because 37661201 - 2¹⁸ = 37399057 is a prime.

Together with 37661203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37661203) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830600 + 18830601.

It is an arithmetic number, because the mean of its divisors is an integer number (18830601).

Almost surely, 2^37661201 is an apocalyptic number.

It is an amenable number.

37661201 is a deficient number, since it is larger than the sum of its proper divisors (1).

37661201 is an equidigital number, since it uses as much as digits as its factorization.

37661201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 37661201 is about 6136.8722489555. The cubic root of 37661201 is about 335.1954039324.

Adding to 37661201 its reverse (10216673), we get a palindrome (47877874).

The spelling of 37661201 in words is "thirty-seven million, six hundred sixty-one thousand, two hundred one".