73920071 has 4 divisors (see below), whose sum is σ = 74229600. Its totient is φ = 73610544.

The previous prime is 73920059. The next prime is 73920079. The reversal of 73920071 is 17002937.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17002937 = 7 ⋅2428991.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73920071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73920079) 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, 154406 + ... + 154883.

It is an arithmetic number, because the mean of its divisors is an integer number (18557400).

Almost surely, 2^73920071 is an apocalyptic number.

73920071 is a deficient number, since it is larger than the sum of its proper divisors (309529).

73920071 is a wasteful number, since it uses less digits than its factorization.

73920071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309528.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 73920071 is about 8597.6782331046. The cubic root of 73920071 is about 419.6824337928.

The spelling of 73920071 in words is "seventy-three million, nine hundred twenty thousand, seventy-one".