787542397 has 2 divisors, whose sum is σ = 787542398. Its totient is φ = 787542396.

The previous prime is 787542361. The next prime is 787542401. The reversal of 787542397 is 793245787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 773896761 + 13645636 = 27819^2 + 3694^2 .

It is a cyclic number.

It is not a de Polignac number, because 787542397 - 2¹⁵ = 787509629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (787542307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393771198 + 393771199.

It is an arithmetic number, because the mean of its divisors is an integer number (393771199).

Almost surely, 2^787542397 is an apocalyptic number.

It is an amenable number.

787542397 is a deficient number, since it is larger than the sum of its proper divisors (1).

787542397 is an equidigital number, since it uses as much as digits as its factorization.

787542397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 52.

The square root of 787542397 is about 28063.1857956291. The cubic root of 787542397 is about 923.4739471265.

The spelling of 787542397 in words is "seven hundred eighty-seven million, five hundred forty-two thousand, three hundred ninety-seven".