79632281 has 4 divisors (see below), whose sum is σ = 79983312. Its totient is φ = 79281252.

The previous prime is 79632277. The next prime is 79632299. The reversal of 79632281 is 18223697.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18223697 = 241 ⋅75617.

It is a cyclic number.

It is not a de Polignac number, because 79632281 - 2² = 79632277 is a prime.

It is a super-2 number, since 2×79632281² = 12682600354525922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79632271) 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, 175175 + ... + 175628.

It is an arithmetic number, because the mean of its divisors is an integer number (19995828).

Almost surely, 2^79632281 is an apocalyptic number.

It is an amenable number.

79632281 is a deficient number, since it is larger than the sum of its proper divisors (351031).

79632281 is a wasteful number, since it uses less digits than its factorization.

79632281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351030.

The product of its digits is 36288, while the sum is 38.

The square root of 79632281 is about 8923.6921170556. The cubic root of 79632281 is about 430.2257350907.

The spelling of 79632281 in words is "seventy-nine million, six hundred thirty-two thousand, two hundred eighty-one".