39090797 has 2 divisors, whose sum is σ = 39090798. Its totient is φ = 39090796.

The previous prime is 39090791. The next prime is 39090829. The reversal of 39090797 is 79709093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 15217801 = 4886^2 + 3901^2 .

It is an emirp because it is prime and its reverse (79709093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39090797 - 2⁴ = 39090781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39090791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19545398 + 19545399.

It is an arithmetic number, because the mean of its divisors is an integer number (19545399).

Almost surely, 2^39090797 is an apocalyptic number.

It is an amenable number.

39090797 is a deficient number, since it is larger than the sum of its proper divisors (1).

39090797 is an equidigital number, since it uses as much as digits as its factorization.

39090797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107163, while the sum is 44.

The square root of 39090797 is about 6252.2633501797. The cubic root of 39090797 is about 339.3841128324.

The spelling of 39090797 in words is "thirty-nine million, ninety thousand, seven hundred ninety-seven".