787421339 has 2 divisors, whose sum is σ = 787421340. Its totient is φ = 787421338.

The previous prime is 787421303. The next prime is 787421347. The reversal of 787421339 is 933124787.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-787421339 is a prime.

It is a super-2 number, since 2×787421339² = 1240064730225105842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 787421339.

It is not a weakly prime, because it can be changed into another prime (787421539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393710669 + 393710670.

It is an arithmetic number, because the mean of its divisors is an integer number (393710670).

Almost surely, 2^787421339 is an apocalyptic number.

787421339 is a deficient number, since it is larger than the sum of its proper divisors (1).

787421339 is an equidigital number, since it uses as much as digits as its factorization.

787421339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 787421339 is about 28061.0288300340. The cubic root of 787421339 is about 923.4266270761.

The spelling of 787421339 in words is "seven hundred eighty-seven million, four hundred twenty-one thousand, three hundred thirty-nine".