73156345 has 4 divisors (see below), whose sum is σ = 87787620. Its totient is φ = 58525072.

The previous prime is 73156339. The next prime is 73156351. The reversal of 73156345 is 54365137.

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

It is an interprime number because it is at equal distance from previous prime (73156339) and next prime (73156351).

It can be written as a sum of positive squares in 2 ways, for example, as 38675961 + 34480384 = 6219^2 + 5872^2 .

It is a cyclic number.

It is not a de Polignac number, because 73156345 - 2⁷ = 73156217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73156345.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7315630 + ... + 7315639.

It is an arithmetic number, because the mean of its divisors is an integer number (21946905).

Almost surely, 2^73156345 is an apocalyptic number.

It is an amenable number.

73156345 is a deficient number, since it is larger than the sum of its proper divisors (14631275).

73156345 is a wasteful number, since it uses less digits than its factorization.

73156345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14631274.

The product of its digits is 37800, while the sum is 34.

The square root of 73156345 is about 8553.1482507905. The cubic root of 73156345 is about 418.2320716302.

The spelling of 73156345 in words is "seventy-three million, one hundred fifty-six thousand, three hundred forty-five".