946747661 has 2 divisors, whose sum is σ = 946747662. Its totient is φ = 946747660.

The previous prime is 946747603. The next prime is 946747667. The reversal of 946747661 is 166747649.

It is a happy number.

946747661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515562436 + 431185225 = 22706^2 + 20765^2 .

It is a cyclic number.

It is not a de Polignac number, because 946747661 - 2²⁶ = 879638797 is a prime.

It is a super-2 number, since 2×946747661² = 1792662267217941842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (946747667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473373830 + 473373831.

It is an arithmetic number, because the mean of its divisors is an integer number (473373831).

Almost surely, 2^946747661 is an apocalyptic number.

It is an amenable number.

946747661 is a deficient number, since it is larger than the sum of its proper divisors (1).

946747661 is an equidigital number, since it uses as much as digits as its factorization.

946747661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The square root of 946747661 is about 30769.2648758465. The cubic root of 946747661 is about 981.9244639047.

The spelling of 946747661 in words is "nine hundred forty-six million, seven hundred forty-seven thousand, six hundred sixty-one".