946315681 has 2 divisors, whose sum is σ = 946315682. Its totient is φ = 946315680.

The previous prime is 946315679. The next prime is 946315751. The reversal of 946315681 is 186513649.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696960000 + 249355681 = 26400^2 + 15791^2 .

It is a cyclic number.

It is not a de Polignac number, because 946315681 - 2¹ = 946315679 is a prime.

It is a super-2 number, since 2×946315681² = 1791026736212987522, which contains 22 as substring.

Together with 946315679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (946315621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473157840 + 473157841.

It is an arithmetic number, because the mean of its divisors is an integer number (473157841).

Almost surely, 2^946315681 is an apocalyptic number.

It is an amenable number.

946315681 is a deficient number, since it is larger than the sum of its proper divisors (1).

946315681 is an equidigital number, since it uses as much as digits as its factorization.

946315681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 946315681 is about 30762.2444077151. The cubic root of 946315681 is about 981.7750977195.

The spelling of 946315681 in words is "nine hundred forty-six million, three hundred fifteen thousand, six hundred eighty-one".