768881887 has 2 divisors, whose sum is σ = 768881888. Its totient is φ = 768881886.

The previous prime is 768881857. The next prime is 768881891. The reversal of 768881887 is 788188867.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768881887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768881857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384440943 + 384440944.

It is an arithmetic number, because the mean of its divisors is an integer number (384440944).

Almost surely, 2^768881887 is an apocalyptic number.

768881887 is a deficient number, since it is larger than the sum of its proper divisors (1).

768881887 is an equidigital number, since it uses as much as digits as its factorization.

768881887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9633792, while the sum is 61.

The square root of 768881887 is about 27728.7195340860. The cubic root of 768881887 is about 916.1217837831.

The spelling of 768881887 in words is "seven hundred sixty-eight million, eight hundred eighty-one thousand, eight hundred eighty-seven".