72537823 has 2 divisors, whose sum is σ = 72537824. Its totient is φ = 72537822.

The previous prime is 72537749. The next prime is 72537841. The reversal of 72537823 is 32873527.

It is a strong prime.

It is an emirp because it is prime and its reverse (32873527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72537823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72537893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36268911 + 36268912.

It is an arithmetic number, because the mean of its divisors is an integer number (36268912).

Almost surely, 2^72537823 is an apocalyptic number.

72537823 is a deficient number, since it is larger than the sum of its proper divisors (1).

72537823 is an equidigital number, since it uses as much as digits as its factorization.

72537823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 37.

The square root of 72537823 is about 8516.9139363974. The cubic root of 72537823 is about 417.0500450800.

The spelling of 72537823 in words is "seventy-two million, five hundred thirty-seven thousand, eight hundred twenty-three".