37929421 has 2 divisors, whose sum is σ = 37929422. Its totient is φ = 37929420.

The previous prime is 37929383. The next prime is 37929443. The reversal of 37929421 is 12492973.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22610025 + 15319396 = 4755^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 37929421 - 2¹⁵ = 37896653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37929481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18964710 + 18964711.

It is an arithmetic number, because the mean of its divisors is an integer number (18964711).

Almost surely, 2^37929421 is an apocalyptic number.

It is an amenable number.

37929421 is a deficient number, since it is larger than the sum of its proper divisors (1).

37929421 is an equidigital number, since it uses as much as digits as its factorization.

37929421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 37929421 is about 6158.6866294690. The cubic root of 37929421 is about 335.9892670655.

The spelling of 37929421 in words is "thirty-seven million, nine hundred twenty-nine thousand, four hundred twenty-one".