72351907 has 4 divisors (see below), whose sum is σ = 72427696. Its totient is φ = 72276120.

The previous prime is 72351901. The next prime is 72351947. The reversal of 72351907 is 70915327.

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

It is a cyclic number.

It is not a de Polignac number, because 72351907 - 2³ = 72351899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72351901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36444 + ... + 38377.

It is an arithmetic number, because the mean of its divisors is an integer number (18106924).

Almost surely, 2^72351907 is an apocalyptic number.

72351907 is a deficient number, since it is larger than the sum of its proper divisors (75789).

72351907 is an equidigital number, since it uses as much as digits as its factorization.

72351907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75788.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 72351907 is about 8505.9924171139. The cubic root of 72351907 is about 416.6934374977.

The spelling of 72351907 in words is "seventy-two million, three hundred fifty-one thousand, nine hundred seven".