425561899 has 4 divisors (see below), whose sum is σ = 486356464. Its totient is φ = 364767336.

The previous prime is 425561839. The next prime is 425561909. The reversal of 425561899 is 998165524.

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 425561899 - 2¹⁷ = 425430827 is a prime.

It is a super-2 number, since 2×425561899² = 362205859760972402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425561819) 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, 30397272 + ... + 30397285.

It is an arithmetic number, because the mean of its divisors is an integer number (121589116).

Almost surely, 2^425561899 is an apocalyptic number.

425561899 is a deficient number, since it is larger than the sum of its proper divisors (60794565).

425561899 is an equidigital number, since it uses as much as digits as its factorization.

425561899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60794564.

The product of its digits is 777600, while the sum is 49.

The square root of 425561899 is about 20629.1516791166. The cubic root of 425561899 is about 752.1784951223.

The spelling of 425561899 in words is "four hundred twenty-five million, five hundred sixty-one thousand, eight hundred ninety-nine".