79840067 has 4 divisors (see below), whose sum is σ = 79979016. Its totient is φ = 79701120.

The previous prime is 79840049. The next prime is 79840069. The reversal of 79840067 is 76004897.

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 79840067 - 2⁶ = 79840003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79840069) 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, 68609 + ... + 69762.

It is an arithmetic number, because the mean of its divisors is an integer number (19994754).

Almost surely, 2^79840067 is an apocalyptic number.

79840067 is a deficient number, since it is larger than the sum of its proper divisors (138949).

79840067 is a wasteful number, since it uses less digits than its factorization.

79840067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138948.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 79840067 is about 8935.3269106396. The cubic root of 79840067 is about 430.5996087792.

The spelling of 79840067 in words is "seventy-nine million, eight hundred forty thousand, sixty-seven".