72290453 has 4 divisors (see below), whose sum is σ = 72319500. Its totient is φ = 72261408.

The previous prime is 72290441. The next prime is 72290461. The reversal of 72290453 is 35409227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35409227 = 7 ⋅5058461.

It can be written as a sum of positive squares in 2 ways, for example, as 20133169 + 52157284 = 4487^2 + 7222^2 .

It is a cyclic number.

It is not a de Polignac number, because 72290453 - 2⁴ = 72290437 is a prime.

It is a super-3 number, since 3×72290453³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72290423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10400 + ... + 15897.

It is an arithmetic number, because the mean of its divisors is an integer number (18079875).

Almost surely, 2^72290453 is an apocalyptic number.

It is an amenable number.

72290453 is a deficient number, since it is larger than the sum of its proper divisors (29047).

72290453 is a wasteful number, since it uses less digits than its factorization.

72290453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29046.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 72290453 is about 8502.3792552438. The cubic root of 72290453 is about 416.5754275603.

The spelling of 72290453 in words is "seventy-two million, two hundred ninety thousand, four hundred fifty-three".