321874961 has 2 divisors, whose sum is σ = 321874962. Its totient is φ = 321874960.

The previous prime is 321874937. The next prime is 321874967. The reversal of 321874961 is 169478123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230098561 + 91776400 = 15169^2 + 9580^2 .

It is a cyclic number.

It is not a de Polignac number, because 321874961 - 2¹⁴ = 321858577 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (321874967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160937480 + 160937481.

It is an arithmetic number, because the mean of its divisors is an integer number (160937481).

Almost surely, 2^321874961 is an apocalyptic number.

It is an amenable number.

321874961 is a deficient number, since it is larger than the sum of its proper divisors (1).

321874961 is an equidigital number, since it uses as much as digits as its factorization.

321874961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 321874961 is about 17940.8740311056. The cubic root of 321874961 is about 685.3236689442.

The spelling of 321874961 in words is "three hundred twenty-one million, eight hundred seventy-four thousand, nine hundred sixty-one".