68402273 has 4 divisors (see below), whose sum is σ = 68622528. Its totient is φ = 68182020.

The previous prime is 68402267. The next prime is 68402281. The reversal of 68402273 is 37220486.

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 68402273 - 2¹² = 68398177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68402573) 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, 109661 + ... + 110282.

It is an arithmetic number, because the mean of its divisors is an integer number (17155632).

Almost surely, 2^68402273 is an apocalyptic number.

It is an amenable number.

68402273 is a deficient number, since it is larger than the sum of its proper divisors (220255).

68402273 is a wasteful number, since it uses less digits than its factorization.

68402273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220254.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 68402273 is about 8270.5666674056. The cubic root of 68402273 is about 408.9688006123.

The spelling of 68402273 in words is "sixty-eight million, four hundred two thousand, two hundred seventy-three".