39249797 has 2 divisors, whose sum is σ = 39249798. Its totient is φ = 39249796.

The previous prime is 39249773. The next prime is 39249851. The reversal of 39249797 is 79794293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 14638276 = 4961^2 + 3826^2 .

It is an emirp because it is prime and its reverse (79794293) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39249797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39249737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19624898 + 19624899.

It is an arithmetic number, because the mean of its divisors is an integer number (19624899).

Almost surely, 2^39249797 is an apocalyptic number.

It is an amenable number.

39249797 is a deficient number, since it is larger than the sum of its proper divisors (1).

39249797 is an equidigital number, since it uses as much as digits as its factorization.

39249797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 50.

The square root of 39249797 is about 6264.9658418861. The cubic root of 39249797 is about 339.8436334034.

The spelling of 39249797 in words is "thirty-nine million, two hundred forty-nine thousand, seven hundred ninety-seven".