764788121 has 4 divisors (see below), whose sum is σ = 764857872. Its totient is φ = 764718372.

The previous prime is 764788103. The next prime is 764788127. The reversal of 764788121 is 121887467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 764788121 - 2¹⁴ = 764771737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764788127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14435 + ... + 41688.

It is an arithmetic number, because the mean of its divisors is an integer number (191214468).

Almost surely, 2^764788121 is an apocalyptic number.

It is an amenable number.

764788121 is a deficient number, since it is larger than the sum of its proper divisors (69751).

764788121 is a wasteful number, since it uses less digits than its factorization.

764788121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69750.

The product of its digits is 150528, while the sum is 44.

The square root of 764788121 is about 27654.8028559236. The cubic root of 764788121 is about 914.4929839594.

The spelling of 764788121 in words is "seven hundred sixty-four million, seven hundred eighty-eight thousand, one hundred twenty-one".