72430907 has 4 divisors (see below), whose sum is σ = 76243080. Its totient is φ = 68618736.

The previous prime is 72430889. The next prime is 72430909. The reversal of 72430907 is 70903427.

It is a happy number.

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 72430907 - 2⁸ = 72430651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72430909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1906058 + ... + 1906095.

It is an arithmetic number, because the mean of its divisors is an integer number (19060770).

Almost surely, 2^72430907 is an apocalyptic number.

72430907 is a deficient number, since it is larger than the sum of its proper divisors (3812173).

72430907 is a wasteful number, since it uses less digits than its factorization.

72430907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812172.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 72430907 is about 8510.6349351855. The cubic root of 72430907 is about 416.8450428435.

It can be divided in two parts, 72430 and 907, that added together give a palindrome (73337).

The spelling of 72430907 in words is "seventy-two million, four hundred thirty thousand, nine hundred seven".