72345567 has 8 divisors (see below), whose sum is σ = 110240896. Its totient is φ = 41340312.

The previous prime is 72345563. The next prime is 72345577. The reversal of 72345567 is 76554327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72345567 - 2² = 72345563 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 (72345563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1722493 + ... + 1722534.

It is an arithmetic number, because the mean of its divisors is an integer number (13780112).

Almost surely, 2^72345567 is an apocalyptic number.

72345567 is a deficient number, since it is larger than the sum of its proper divisors (37895329).

72345567 is a wasteful number, since it uses less digits than its factorization.

72345567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445037.

The product of its digits is 176400, while the sum is 39.

The square root of 72345567 is about 8505.6197305076. The cubic root of 72345567 is about 416.6812659062.

The spelling of 72345567 in words is "seventy-two million, three hundred forty-five thousand, five hundred sixty-seven".