779640471 has 24 divisors (see below), whose sum is σ = 1229329920. Its totient is φ = 492401592.

The previous prime is 779640469. The next prime is 779640473. The reversal of 779640471 is 174046977.

It is an interprime number because it is at equal distance from previous prime (779640469) and next prime (779640473).

It is not a de Polignac number, because 779640471 - 2¹ = 779640469 is a prime.

It is a super-3 number, since 3×779640471³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779640473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79815 + ... + 89048.

It is an arithmetic number, because the mean of its divisors is an integer number (51222080).

Almost surely, 2^779640471 is an apocalyptic number.

779640471 is a deficient number, since it is larger than the sum of its proper divisors (449689449).

779640471 is a wasteful number, since it uses less digits than its factorization.

779640471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168897 (or 168885 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 779640471 is about 27922.0427440401. The cubic root of 779640471 is about 920.3749538901.

The spelling of 779640471 in words is "seven hundred seventy-nine million, six hundred forty thousand, four hundred seventy-one".