72299653 has 4 divisors (see below), whose sum is σ = 72328300. Its totient is φ = 72271008.

The previous prime is 72299621. The next prime is 72299663. The reversal of 72299653 is 35699227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35699227 = 829 ⋅43063.

It can be written as a sum of positive squares in 2 ways, for example, as 21362884 + 50936769 = 4622^2 + 7137^2 .

It is a cyclic number.

It is not a de Polignac number, because 72299653 - 2⁵ = 72299621 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 (72299663) 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, 10128 + ... + 15721.

It is an arithmetic number, because the mean of its divisors is an integer number (18082075).

Almost surely, 2^72299653 is an apocalyptic number.

It is an amenable number.

72299653 is a deficient number, since it is larger than the sum of its proper divisors (28647).

72299653 is a wasteful number, since it uses less digits than its factorization.

72299653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28646.

The product of its digits is 204120, while the sum is 43.

The square root of 72299653 is about 8502.9202630626. The cubic root of 72299653 is about 416.5930985491.

The spelling of 72299653 in words is "seventy-two million, two hundred ninety-nine thousand, six hundred fifty-three".