425649287 has 4 divisors (see below), whose sum is σ = 486456336. Its totient is φ = 364842240.

The previous prime is 425649283. The next prime is 425649299. The reversal of 425649287 is 782946524.

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

It is not a de Polignac number, because 425649287 - 2² = 425649283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425649283) 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, 30403514 + ... + 30403527.

It is an arithmetic number, because the mean of its divisors is an integer number (121614084).

Almost surely, 2^425649287 is an apocalyptic number.

425649287 is a deficient number, since it is larger than the sum of its proper divisors (60807049).

425649287 is an equidigital number, since it uses as much as digits as its factorization.

425649287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60807048.

The product of its digits is 967680, while the sum is 47.

The square root of 425649287 is about 20631.2696410085. The cubic root of 425649287 is about 752.2299775473.

The spelling of 425649287 in words is "four hundred twenty-five million, six hundred forty-nine thousand, two hundred eighty-seven".