79942001 has 4 divisors (see below), whose sum is σ = 80063604. Its totient is φ = 79820400.

The previous prime is 79941989. The next prime is 79942003. The reversal of 79942001 is 10024997.

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

It can be written as a sum of positive squares in 2 ways, for example, as 71233600 + 8708401 = 8440^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 79942001 - 2²⁶ = 12833137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79942003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59810 + ... + 61131.

It is an arithmetic number, because the mean of its divisors is an integer number (20015901).

Almost surely, 2^79942001 is an apocalyptic number.

It is an amenable number.

79942001 is a deficient number, since it is larger than the sum of its proper divisors (121603).

79942001 is a wasteful number, since it uses less digits than its factorization.

79942001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121602.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 79942001 is about 8941.0290794740. The cubic root of 79942001 is about 430.7827836175.

Adding to 79942001 its reverse (10024997), we get a palindrome (89966998).

The spelling of 79942001 in words is "seventy-nine million, nine hundred forty-two thousand, one".