961921465 has 4 divisors (see below), whose sum is σ = 1154305764. Its totient is φ = 769537168.

The previous prime is 961921453. The next prime is 961921469. The reversal of 961921465 is 564129169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564129169 = 43 ⋅13119283.

It can be written as a sum of positive squares in 2 ways, for example, as 682463376 + 279458089 = 26124^2 + 16717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961921465 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961921469) 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, 96192142 + ... + 96192151.

It is an arithmetic number, because the mean of its divisors is an integer number (288576441).

Almost surely, 2^961921465 is an apocalyptic number.

It is an amenable number.

961921465 is a deficient number, since it is larger than the sum of its proper divisors (192384299).

961921465 is a wasteful number, since it uses less digits than its factorization.

961921465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192384298.

The product of its digits is 116640, while the sum is 43.

The square root of 961921465 is about 31014.8587776891. The cubic root of 961921465 is about 987.1425494716.

The spelling of 961921465 in words is "nine hundred sixty-one million, nine hundred twenty-one thousand, four hundred sixty-five".