39974797 has 2 divisors, whose sum is σ = 39974798. Its totient is φ = 39974796.

The previous prime is 39974771. The next prime is 39974827. The reversal of 39974797 is 79747993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34503876 + 5470921 = 5874^2 + 2339^2 .

It is a cyclic number.

It is not a de Polignac number, because 39974797 - 2¹⁵ = 39942029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39974707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19987398 + 19987399.

It is an arithmetic number, because the mean of its divisors is an integer number (19987399).

Almost surely, 2^39974797 is an apocalyptic number.

It is an amenable number.

39974797 is a deficient number, since it is larger than the sum of its proper divisors (1).

39974797 is an equidigital number, since it uses as much as digits as its factorization.

39974797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000564, while the sum is 55.

The square root of 39974797 is about 6322.5625342894. The cubic root of 39974797 is about 341.9233467048.

The spelling of 39974797 in words is "thirty-nine million, nine hundred seventy-four thousand, seven hundred ninety-seven".