37929989 has 2 divisors, whose sum is σ = 37929990. Its totient is φ = 37929988.

The previous prime is 37929977. The next prime is 37930003. The reversal of 37929989 is 98992973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37920964 + 9025 = 6158^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 37929989 - 2⁸ = 37929733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37929949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18964994 + 18964995.

It is an arithmetic number, because the mean of its divisors is an integer number (18964995).

Almost surely, 2^37929989 is an apocalyptic number.

It is an amenable number.

37929989 is a deficient number, since it is larger than the sum of its proper divisors (1).

37929989 is an equidigital number, since it uses as much as digits as its factorization.

37929989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 56.

The square root of 37929989 is about 6158.7327430243. The cubic root of 37929989 is about 335.9909442240.

The spelling of 37929989 in words is "thirty-seven million, nine hundred twenty-nine thousand, nine hundred eighty-nine".