425236109 has 2 divisors, whose sum is σ = 425236110. Its totient is φ = 425236108.

The previous prime is 425236099. The next prime is 425236117. The reversal of 425236109 is 901632524.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423124900 + 2111209 = 20570^2 + 1453^2 .

It is a cyclic number.

It is not a de Polignac number, because 425236109 - 2¹² = 425232013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425236199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212618054 + 212618055.

It is an arithmetic number, because the mean of its divisors is an integer number (212618055).

Almost surely, 2^425236109 is an apocalyptic number.

It is an amenable number.

425236109 is a deficient number, since it is larger than the sum of its proper divisors (1).

425236109 is an equidigital number, since it uses as much as digits as its factorization.

425236109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 425236109 is about 20621.2538173604. The cubic root of 425236109 is about 751.9865020636.

The spelling of 425236109 in words is "four hundred twenty-five million, two hundred thirty-six thousand, one hundred nine".