72507389 has 8 divisors (see below), whose sum is σ = 73641792. Its totient is φ = 71379360.

The previous prime is 72507367. The next prime is 72507433. The reversal of 72507389 is 98370527.

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

It is a cyclic number.

It is not a de Polignac number, because 72507389 - 2⁸ = 72507133 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 (72507359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24584 + ... + 27374.

It is an arithmetic number, because the mean of its divisors is an integer number (9205224).

Almost surely, 2^72507389 is an apocalyptic number.

It is an amenable number.

72507389 is a deficient number, since it is larger than the sum of its proper divisors (1134403).

72507389 is a wasteful number, since it uses less digits than its factorization.

72507389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 72507389 is about 8515.1270689286. The cubic root of 72507389 is about 416.9917110226.

The spelling of 72507389 in words is "seventy-two million, five hundred seven thousand, three hundred eighty-nine".