72250399 has 4 divisors (see below), whose sum is σ = 77808136. Its totient is φ = 66692664.

The previous prime is 72250361. The next prime is 72250403. The reversal of 72250399 is 99305227.

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 72250399 - 2¹³ = 72242207 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 (72250309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2778849 + ... + 2778874.

It is an arithmetic number, because the mean of its divisors is an integer number (19452034).

Almost surely, 2^72250399 is an apocalyptic number.

72250399 is a deficient number, since it is larger than the sum of its proper divisors (5557737).

72250399 is a wasteful number, since it uses less digits than its factorization.

72250399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5557736.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 72250399 is about 8500.0234705558. The cubic root of 72250399 is about 416.4984759755.

The spelling of 72250399 in words is "seventy-two million, two hundred fifty thousand, three hundred ninety-nine".