961741643 has 2 divisors, whose sum is σ = 961741644. Its totient is φ = 961741642.

The previous prime is 961741621. The next prime is 961741661. The reversal of 961741643 is 346147169.

It is a strong prime.

It is an emirp because it is prime and its reverse (346147169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 961741643 - 2⁶ = 961741579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 961741643.

It is not a weakly prime, because it can be changed into another prime (961741043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480870821 + 480870822.

It is an arithmetic number, because the mean of its divisors is an integer number (480870822).

Almost surely, 2^961741643 is an apocalyptic number.

961741643 is a deficient number, since it is larger than the sum of its proper divisors (1).

961741643 is an equidigital number, since it uses as much as digits as its factorization.

961741643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 961741643 is about 31011.9596768730. The cubic root of 961741643 is about 987.0810333581.

The spelling of 961741643 in words is "nine hundred sixty-one million, seven hundred forty-one thousand, six hundred forty-three".