72253993 has 16 divisors (see below), whose sum is σ = 87252480. Its totient is φ = 58516416.

The previous prime is 72253991. The next prime is 72254003. The reversal of 72253993 is 39935227.

It is a happy number.

It is not a de Polignac number, because 72253993 - 2¹ = 72253991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72253991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5755 + ... + 13327.

It is an arithmetic number, because the mean of its divisors is an integer number (5453280).

Almost surely, 2^72253993 is an apocalyptic number.

It is an amenable number.

72253993 is a deficient number, since it is larger than the sum of its proper divisors (14998487).

72253993 is a wasteful number, since it uses less digits than its factorization.

72253993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7656.

The product of its digits is 102060, while the sum is 40.

The square root of 72253993 is about 8500.2348791078. The cubic root of 72253993 is about 416.5053819152.

The spelling of 72253993 in words is "seventy-two million, two hundred fifty-three thousand, nine hundred ninety-three".