73111979 has 4 divisors (see below), whose sum is σ = 74895240. Its totient is φ = 71328720.

The previous prime is 73111967. The next prime is 73111991. The reversal of 73111979 is 97911137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97911137 = 757 ⋅129341.

It is an interprime number because it is at equal distance from previous prime (73111967) and next prime (73111991).

It is a cyclic number.

It is not a de Polignac number, because 73111979 - 2⁸ = 73111723 is a prime.

It is a super-2 number, since 2×73111979² = 10690722946592882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73111939) 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, 891569 + ... + 891650.

It is an arithmetic number, because the mean of its divisors is an integer number (18723810).

Almost surely, 2^73111979 is an apocalyptic number.

73111979 is a deficient number, since it is larger than the sum of its proper divisors (1783261).

73111979 is a wasteful number, since it uses less digits than its factorization.

73111979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783260.

The product of its digits is 11907, while the sum is 38.

The square root of 73111979 is about 8550.5543095170. The cubic root of 73111979 is about 418.1475082824.

The spelling of 73111979 in words is "seventy-three million, one hundred eleven thousand, nine hundred seventy-nine".