72499999 has 8 divisors (see below), whose sum is σ = 85174992. Its totient is φ = 60839040.

The previous prime is 72499997. The next prime is 72500027. The reversal of 72499999 is 99999427.

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 72499999 - 2¹ = 72499997 is a prime.

It is a Duffinian number.

72499999 is a modest number, since divided by 9999 gives 7249 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72499993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253354 + ... + 253639.

It is an arithmetic number, because the mean of its divisors is an integer number (10646874).

Almost surely, 2^72499999 is an apocalyptic number.

72499999 is a deficient number, since it is larger than the sum of its proper divisors (12674993).

72499999 is a wasteful number, since it uses less digits than its factorization.

72499999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507017.

The product of its digits is 3306744, while the sum is 58.

The square root of 72499999 is about 8514.6931242412. The cubic root of 72499999 is about 416.9775438530.

The spelling of 72499999 in words is "seventy-two million, four hundred ninety-nine thousand, nine hundred ninety-nine".