961658263 has 4 divisors (see below), whose sum is σ = 961801848. Its totient is φ = 961514680.

The previous prime is 961658251. The next prime is 961658279. The reversal of 961658263 is 362856169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362856169 = 13 ⋅27912013.

It is a cyclic number.

It is not a de Polignac number, because 961658263 - 2¹³ = 961650071 is a prime.

It is a super-2 number, since 2×961658263² = 1849573229592354338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961659263) 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, 61228 + ... + 75313.

It is an arithmetic number, because the mean of its divisors is an integer number (240450462).

Almost surely, 2^961658263 is an apocalyptic number.

961658263 is a deficient number, since it is larger than the sum of its proper divisors (143585).

961658263 is a wasteful number, since it uses less digits than its factorization.

961658263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143584.

The product of its digits is 466560, while the sum is 46.

The square root of 961658263 is about 31010.6153276584. The cubic root of 961658263 is about 987.0525069184.

The spelling of 961658263 in words is "nine hundred sixty-one million, six hundred fifty-eight thousand, two hundred sixty-three".