961993 has 2 divisors, whose sum is σ = 961994. Its totient is φ = 961992.

The previous prime is 961991. The next prime is 962009. The reversal of 961993 is 399169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840889 + 121104 = 917^2 + 348^2 .

It is a cyclic number.

It is not a de Polignac number, because 961993 - 2¹ = 961991 is a prime.

Together with 961991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (961991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480996 + 480997.

It is an arithmetic number, because the mean of its divisors is an integer number (480997).

2⁹⁶¹⁹⁹³ is an apocalyptic number.

It is an amenable number.

961993 is a deficient number, since it is larger than the sum of its proper divisors (1).

961993 is an equidigital number, since it uses as much as digits as its factorization.

961993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 37.

The square root of 961993 is about 980.8124183553. The cubic root of 961993 is about 98.7167019069.

The spelling of 961993 in words is "nine hundred sixty-one thousand, nine hundred ninety-three".