425780999 has 4 divisors (see below), whose sum is σ = 486606864. Its totient is φ = 364955136.

The previous prime is 425780977. The next prime is 425781011. The reversal of 425780999 is 999087524.

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

It is not a de Polignac number, because 425780999 - 2⁸ = 425780743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 425780999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425780699) 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, 30412922 + ... + 30412935.

It is an arithmetic number, because the mean of its divisors is an integer number (121651716).

Almost surely, 2^425780999 is an apocalyptic number.

425780999 is a deficient number, since it is larger than the sum of its proper divisors (60825865).

425780999 is an equidigital number, since it uses as much as digits as its factorization.

425780999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60825864.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 425780999 is about 20634.4614419664. The cubic root of 425780999 is about 752.3075590212.

The spelling of 425780999 in words is "four hundred twenty-five million, seven hundred eighty thousand, nine hundred ninety-nine".