72681293 has 4 divisors (see below), whose sum is σ = 73204320. Its totient is φ = 72158268.

The previous prime is 72681281. The next prime is 72681331. The reversal of 72681293 is 39218627.

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.

It is a cyclic number.

It is not a de Polignac number, because 72681293 - 2¹² = 72677197 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 (72681253) 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, 261305 + ... + 261582.

It is an arithmetic number, because the mean of its divisors is an integer number (18301080).

Almost surely, 2^72681293 is an apocalyptic number.

It is an amenable number.

72681293 is a deficient number, since it is larger than the sum of its proper divisors (523027).

72681293 is a wasteful number, since it uses less digits than its factorization.

72681293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523026.

The product of its digits is 36288, while the sum is 38.

The square root of 72681293 is about 8525.3324275362. The cubic root of 72681293 is about 417.3248201919.

The spelling of 72681293 in words is "seventy-two million, six hundred eighty-one thousand, two hundred ninety-three".