780725423 has 4 divisors (see below), whose sum is σ = 780954720. Its totient is φ = 780496128.

The previous prime is 780725411. The next prime is 780725467. The reversal of 780725423 is 324527087.

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 780725423 - 2¹⁸ = 780463279 is a prime.

It is a super-2 number, since 2×780725423² = 1219064372237057858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780724423) 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 in 3 ways as a sum of consecutive naturals, for example, 109463 + ... + 116376.

It is an arithmetic number, because the mean of its divisors is an integer number (195238680).

Almost surely, 2^780725423 is an apocalyptic number.

780725423 is a deficient number, since it is larger than the sum of its proper divisors (229297).

780725423 is a wasteful number, since it uses less digits than its factorization.

780725423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229296.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 780725423 is about 27941.4642243387. The cubic root of 780725423 is about 920.8016889644.

The spelling of 780725423 in words is "seven hundred eighty million, seven hundred twenty-five thousand, four hundred twenty-three".