767964881 has 2 divisors, whose sum is σ = 767964882. Its totient is φ = 767964880.

The previous prime is 767964839. The next prime is 767964943. The reversal of 767964881 is 188469767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734139025 + 33825856 = 27095^2 + 5816^2 .

It is an emirp because it is prime and its reverse (188469767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 767964881 - 2¹⁰ = 767963857 is a prime.

It is a super-2 number, since 2×767964881² = 1179540116898688322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (767960881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383982440 + 383982441.

It is an arithmetic number, because the mean of its divisors is an integer number (383982441).

Almost surely, 2^767964881 is an apocalyptic number.

It is an amenable number.

767964881 is a deficient number, since it is larger than the sum of its proper divisors (1).

767964881 is an equidigital number, since it uses as much as digits as its factorization.

767964881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 56.

The square root of 767964881 is about 27712.1792899801. The cubic root of 767964881 is about 915.7574350731.

The spelling of 767964881 in words is "seven hundred sixty-seven million, nine hundred sixty-four thousand, eight hundred eighty-one".