68172453 has 6 divisors (see below), whose sum is σ = 98471334. Its totient is φ = 45448296.

The previous prime is 68172427. The next prime is 68172491. The reversal of 68172453 is 35427186.

It can be written as a sum of positive squares in only one way, i.e., 66879684 + 1292769 = 8178^2 + 1137^2 .

It is not a de Polignac number, because 68172453 - 2¹⁶ = 68106917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68172653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3787350 + ... + 3787367.

It is an arithmetic number, because the mean of its divisors is an integer number (16411889).

Almost surely, 2^68172453 is an apocalyptic number.

It is an amenable number.

68172453 is a deficient number, since it is larger than the sum of its proper divisors (30298881).

68172453 is a wasteful number, since it uses less digits than its factorization.

68172453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574723 (or 7574720 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 68172453 is about 8256.6611290521. The cubic root of 68172453 is about 408.5102648301.

The spelling of 68172453 in words is "sixty-eight million, one hundred seventy-two thousand, four hundred fifty-three".