79091963 has 4 divisors (see below), whose sum is σ = 82530768. Its totient is φ = 75653160.

The previous prime is 79091951. The next prime is 79091981. The reversal of 79091963 is 36919097.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79091963 - 2⁶ = 79091899 is a prime.

It is a super-2 number, since 2×79091963² = 12511077222386738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79091933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1719368 + ... + 1719413.

It is an arithmetic number, because the mean of its divisors is an integer number (20632692).

Almost surely, 2^79091963 is an apocalyptic number.

79091963 is a deficient number, since it is larger than the sum of its proper divisors (3438805).

79091963 is a wasteful number, since it uses less digits than its factorization.

79091963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438804.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 79091963 is about 8893.3662355713. The cubic root of 79091963 is about 429.2504754204.

The spelling of 79091963 in words is "seventy-nine million, ninety-one thousand, nine hundred sixty-three".