764345887 has 2 divisors, whose sum is σ = 764345888. Its totient is φ = 764345886.

The previous prime is 764345873. The next prime is 764345893. The reversal of 764345887 is 788543467.

It is a strong prime.

It is an emirp because it is prime and its reverse (788543467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 764345887 - 2¹⁵ = 764313119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764343887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382172943 + 382172944.

It is an arithmetic number, because the mean of its divisors is an integer number (382172944).

Almost surely, 2^764345887 is an apocalyptic number.

764345887 is a deficient number, since it is larger than the sum of its proper divisors (1).

764345887 is an equidigital number, since it uses as much as digits as its factorization.

764345887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 52.

The square root of 764345887 is about 27646.8060903968. The cubic root of 764345887 is about 914.3166833365.

The spelling of 764345887 in words is "seven hundred sixty-four million, three hundred forty-five thousand, eight hundred eighty-seven".