81295963 has 8 divisors (see below), whose sum is σ = 93155328. Its totient is φ = 69498024.

The previous prime is 81295931. The next prime is 81295997. The reversal of 81295963 is 36959218.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81295963 - 2⁵ = 81295931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81295913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12481 + ... + 17842.

It is an arithmetic number, because the mean of its divisors is an integer number (11644416).

Almost surely, 2^81295963 is an apocalyptic number.

81295963 is a deficient number, since it is larger than the sum of its proper divisors (11859365).

81295963 is a wasteful number, since it uses less digits than its factorization.

81295963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30713.

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

The square root of 81295963 is about 9016.4273967021. The cubic root of 81295963 is about 433.2012089630.

The spelling of 81295963 in words is "eighty-one million, two hundred ninety-five thousand, nine hundred sixty-three".