72900293 has 4 divisors (see below), whose sum is σ = 73045728. Its totient is φ = 72754860.

The previous prime is 72900259. The next prime is 72900299. The reversal of 72900293 is 39200927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39200927 = 73 ⋅536999.

It is a cyclic number.

It is not a de Polignac number, because 72900293 - 2¹⁸ = 72638149 is a prime.

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 (72900299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71963 + ... + 72968.

It is an arithmetic number, because the mean of its divisors is an integer number (18261432).

Almost surely, 2^72900293 is an apocalyptic number.

It is an amenable number.

72900293 is a deficient number, since it is larger than the sum of its proper divisors (145435).

72900293 is a wasteful number, since it uses less digits than its factorization.

72900293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145434.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 72900293 is about 8538.1668407217. The cubic root of 72900293 is about 417.7435546892.

The spelling of 72900293 in words is "seventy-two million, nine hundred thousand, two hundred ninety-three".