79490643 has 8 divisors (see below), whose sum is σ = 106309056. Its totient is φ = 52833000.

The previous prime is 79490639. The next prime is 79490647. The reversal of 79490643 is 34609497.

It is an interprime number because it is at equal distance from previous prime (79490639) and next prime (79490647).

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

It is not a de Polignac number, because 79490643 - 2² = 79490639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79490595 and 79490604.

It is not an unprimeable number, because it can be changed into a prime (79490647) 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, 39033 + ... + 41018.

It is an arithmetic number, because the mean of its divisors is an integer number (13288632).

Almost surely, 2^79490643 is an apocalyptic number.

79490643 is a deficient number, since it is larger than the sum of its proper divisors (26818413).

79490643 is a wasteful number, since it uses less digits than its factorization.

79490643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80385.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 79490643 is about 8915.7525201185. The cubic root of 79490643 is about 429.9705099660.

The spelling of 79490643 in words is "seventy-nine million, four hundred ninety thousand, six hundred forty-three".