784880431 has 2 divisors, whose sum is σ = 784880432. Its totient is φ = 784880430.

The previous prime is 784880387. The next prime is 784880471. The reversal of 784880431 is 134088487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 784880431 - 2⁷ = 784880303 is a prime.

It is a super-3 number, since 3×784880431³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (784880471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392440215 + 392440216.

It is an arithmetic number, because the mean of its divisors is an integer number (392440216).

Almost surely, 2^784880431 is an apocalyptic number.

784880431 is a deficient number, since it is larger than the sum of its proper divisors (1).

784880431 is an equidigital number, since it uses as much as digits as its factorization.

784880431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 784880431 is about 28015.7175706781. The cubic root of 784880431 is about 922.4322968897.

The spelling of 784880431 in words is "seven hundred eighty-four million, eight hundred eighty thousand, four hundred thirty-one".