964425661 has 2 divisors, whose sum is σ = 964425662. Its totient is φ = 964425660.

The previous prime is 964425647. The next prime is 964425713. The reversal of 964425661 is 166524469.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661004100 + 303421561 = 25710^2 + 17419^2 .

It is a cyclic number.

It is not a de Polignac number, because 964425661 - 2⁹ = 964425149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (964425641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 482212830 + 482212831.

It is an arithmetic number, because the mean of its divisors is an integer number (482212831).

Almost surely, 2^964425661 is an apocalyptic number.

It is an amenable number.

964425661 is a deficient number, since it is larger than the sum of its proper divisors (1).

964425661 is an equidigital number, since it uses as much as digits as its factorization.

964425661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 964425661 is about 31055.2034448335. The cubic root of 964425661 is about 987.9984254347.

The spelling of 964425661 in words is "nine hundred sixty-four million, four hundred twenty-five thousand, six hundred sixty-one".