961378933 has 2 divisors, whose sum is σ = 961378934. Its totient is φ = 961378932.

The previous prime is 961378927. The next prime is 961378961. The reversal of 961378933 is 339873169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651372484 + 310006449 = 25522^2 + 17607^2 .

It is an emirp because it is prime and its reverse (339873169) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961378933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961378973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480689466 + 480689467.

It is an arithmetic number, because the mean of its divisors is an integer number (480689467).

Almost surely, 2^961378933 is an apocalyptic number.

It is an amenable number.

961378933 is a deficient number, since it is larger than the sum of its proper divisors (1).

961378933 is an equidigital number, since it uses as much as digits as its factorization.

961378933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 49.

The square root of 961378933 is about 31006.1112202095. Note that the first 3 decimals coincide. The cubic root of 961378933 is about 986.9569289336.

The spelling of 961378933 in words is "nine hundred sixty-one million, three hundred seventy-eight thousand, nine hundred thirty-three".