73279985 has 4 divisors (see below), whose sum is σ = 87935988. Its totient is φ = 58623984.

The previous prime is 73279981. The next prime is 73280021. The reversal of 73279985 is 58997237.

It is a happy number.

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 10061584 + 63218401 = 3172^2 + 7951^2 .

It is a cyclic number.

It is not a de Polignac number, because 73279985 - 2² = 73279981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73279981) 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, 7327994 + ... + 7328003.

It is an arithmetic number, because the mean of its divisors is an integer number (21983997).

Almost surely, 2^73279985 is an apocalyptic number.

It is an amenable number.

73279985 is a deficient number, since it is larger than the sum of its proper divisors (14656003).

73279985 is a wasteful number, since it uses less digits than its factorization.

73279985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14656002.

The product of its digits is 952560, while the sum is 50.

The square root of 73279985 is about 8560.3729474831. The cubic root of 73279985 is about 418.4675540945.

The spelling of 73279985 in words is "seventy-three million, two hundred seventy-nine thousand, nine hundred eighty-five".