787949797 has 2 divisors, whose sum is σ = 787949798. Its totient is φ = 787949796.

The previous prime is 787949707. The next prime is 787949839. The reversal of 787949797 is 797949787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487482241 + 300467556 = 22079^2 + 17334^2 .

It is a cyclic number.

It is not a de Polignac number, because 787949797 - 2¹¹ = 787947749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (787949707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393974898 + 393974899.

It is an arithmetic number, because the mean of its divisors is an integer number (393974899).

Almost surely, 2^787949797 is an apocalyptic number.

It is an amenable number.

787949797 is a deficient number, since it is larger than the sum of its proper divisors (1).

787949797 is an equidigital number, since it uses as much as digits as its factorization.

787949797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56010528, while the sum is 67.

The square root of 787949797 is about 28070.4434770810. The cubic root of 787949797 is about 923.6331590546.

The spelling of 787949797 in words is "seven hundred eighty-seven million, nine hundred forty-nine thousand, seven hundred ninety-seven".