780044431 has 2 divisors, whose sum is σ = 780044432. Its totient is φ = 780044430.

The previous prime is 780044417. The next prime is 780044437. The reversal of 780044431 is 134440087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 780044431 - 2⁵ = 780044399 is a prime.

It is a super-2 number, since 2×780044431² = 1216938628668227522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 780044393 and 780044402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780044437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390022215 + 390022216.

It is an arithmetic number, because the mean of its divisors is an integer number (390022216).

Almost surely, 2^780044431 is an apocalyptic number.

780044431 is a deficient number, since it is larger than the sum of its proper divisors (1).

780044431 is an equidigital number, since it uses as much as digits as its factorization.

780044431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 780044431 is about 27929.2755187098. The cubic root of 780044431 is about 920.5338863234.

The spelling of 780044431 in words is "seven hundred eighty million, forty-four thousand, four hundred thirty-one".