764471247 has 4 divisors (see below), whose sum is σ = 1019295000. Its totient is φ = 509647496.

The previous prime is 764471209. The next prime is 764471269. The reversal of 764471247 is 742174467.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 764471247 - 2⁷ = 764471119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 764471199 and 764471208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764473247) 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, 127411872 + ... + 127411877.

It is an arithmetic number, because the mean of its divisors is an integer number (254823750).

Almost surely, 2^764471247 is an apocalyptic number.

764471247 is a deficient number, since it is larger than the sum of its proper divisors (254823753).

764471247 is a wasteful number, since it uses less digits than its factorization.

764471247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254823752.

The product of its digits is 263424, while the sum is 42.

The square root of 764471247 is about 27649.0731671063. The cubic root of 764471247 is about 914.3666661500.

The spelling of 764471247 in words is "seven hundred sixty-four million, four hundred seventy-one thousand, two hundred forty-seven".