71872453 has 2 divisors, whose sum is σ = 71872454. Its totient is φ = 71872452.

The previous prime is 71872429. The next prime is 71872487. The reversal of 71872453 is 35427817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49801249 + 22071204 = 7057^2 + 4698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71872453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71872403) 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 as a sum of consecutive naturals, namely, 35936226 + 35936227.

It is an arithmetic number, because the mean of its divisors is an integer number (35936227).

Almost surely, 2^71872453 is an apocalyptic number.

It is an amenable number.

71872453 is a deficient number, since it is larger than the sum of its proper divisors (1).

71872453 is an equidigital number, since it uses as much as digits as its factorization.

71872453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 71872453 is about 8477.7622637109. The cubic root of 71872453 is about 415.7709634352.

The spelling of 71872453 in words is "seventy-one million, eight hundred seventy-two thousand, four hundred fifty-three".