961397773 has 4 divisors (see below), whose sum is σ = 1098740320. Its totient is φ = 824055228.

The previous prime is 961397771. The next prime is 961397779. The reversal of 961397773 is 377793169.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 961397773 - 2¹ = 961397771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 961397773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961397771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68671263 + ... + 68671276.

It is an arithmetic number, because the mean of its divisors is an integer number (274685080).

Almost surely, 2^961397773 is an apocalyptic number.

It is an amenable number.

961397773 is a deficient number, since it is larger than the sum of its proper divisors (137342547).

961397773 is a wasteful number, since it uses less digits than its factorization.

961397773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137342546.

The product of its digits is 1500282, while the sum is 52.

The square root of 961397773 is about 31006.4150297967. The cubic root of 961397773 is about 986.9633759743.

The spelling of 961397773 in words is "nine hundred sixty-one million, three hundred ninety-seven thousand, seven hundred seventy-three".