72345005 has 16 divisors (see below), whose sum is σ = 90858240. Its totient is φ = 55195008.

The previous prime is 72344999. The next prime is 72345011. The reversal of 72345005 is 50054327.

It is an interprime number because it is at equal distance from previous prime (72344999) and next prime (72345011).

It is a cyclic number.

It is not a de Polignac number, because 72345005 - 2⁶ = 72344941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49769 + ... + 51201.

It is an arithmetic number, because the mean of its divisors is an integer number (5678640).

Almost surely, 2^72345005 is an apocalyptic number.

It is an amenable number.

72345005 is a deficient number, since it is larger than the sum of its proper divisors (18513235).

72345005 is a wasteful number, since it uses less digits than its factorization.

72345005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 72345005 is about 8505.5866934621. The cubic root of 72345005 is about 416.6801869391.

The spelling of 72345005 in words is "seventy-two million, three hundred forty-five thousand, five".