425944191 has 8 divisors (see below), whose sum is σ = 568885680. Its totient is φ = 283482752.

The previous prime is 425944159. The next prime is 425944193. The reversal of 425944191 is 191449524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 425944191 - 2⁵ = 425944159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425944193) 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 7 ways as a sum of consecutive naturals, for example, 117936 + ... + 121493.

It is an arithmetic number, because the mean of its divisors is an integer number (71110710).

Almost surely, 2^425944191 is an apocalyptic number.

425944191 is a deficient number, since it is larger than the sum of its proper divisors (142941489).

425944191 is a wasteful number, since it uses less digits than its factorization.

425944191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240025.

The product of its digits is 51840, while the sum is 39.

The square root of 425944191 is about 20638.4154188252. The cubic root of 425944191 is about 752.4036607681.

The spelling of 425944191 in words is "four hundred twenty-five million, nine hundred forty-four thousand, one hundred ninety-one".