961188457 has 2 divisors, whose sum is σ = 961188458. Its totient is φ = 961188456.

The previous prime is 961188427. The next prime is 961188521. The reversal of 961188457 is 754881169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 926837136 + 34351321 = 30444^2 + 5861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961188457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 961188457.

It is not a weakly prime, because it can be changed into another prime (961188427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480594228 + 480594229.

It is an arithmetic number, because the mean of its divisors is an integer number (480594229).

Almost surely, 2^961188457 is an apocalyptic number.

It is an amenable number.

961188457 is a deficient number, since it is larger than the sum of its proper divisors (1).

961188457 is an equidigital number, since it uses as much as digits as its factorization.

961188457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 49.

The square root of 961188457 is about 31003.0394800252. The cubic root of 961188457 is about 986.8917433901.

The spelling of 961188457 in words is "nine hundred sixty-one million, one hundred eighty-eight thousand, four hundred fifty-seven".