37661383 has 2 divisors, whose sum is σ = 37661384. Its totient is φ = 37661382.

The previous prime is 37661369. The next prime is 37661417. The reversal of 37661383 is 38316673.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37661383 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37661483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830691 + 18830692.

It is an arithmetic number, because the mean of its divisors is an integer number (18830692).

Almost surely, 2^37661383 is an apocalyptic number.

37661383 is a deficient number, since it is larger than the sum of its proper divisors (1).

37661383 is an equidigital number, since it uses as much as digits as its factorization.

37661383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 37661383 is about 6136.8870773382. The cubic root of 37661383 is about 335.1959438821.

It can be divided in two parts, 3766 and 1383, that multiplied together give a triangular number (5208378 = T₃₂₂₇).

The spelling of 37661383 in words is "thirty-seven million, six hundred sixty-one thousand, three hundred eighty-three".