72351743 has 4 divisors (see below), whose sum is σ = 72441768. Its totient is φ = 72261720.

The previous prime is 72351733. The next prime is 72351787. The reversal of 72351743 is 34715327.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72351743 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72351733) 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, 43796 + ... + 45417.

It is an arithmetic number, because the mean of its divisors is an integer number (18110442).

Almost surely, 2^72351743 is an apocalyptic number.

72351743 is a deficient number, since it is larger than the sum of its proper divisors (90025).

72351743 is an equidigital number, since it uses as much as digits as its factorization.

72351743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90024.

The product of its digits is 17640, while the sum is 32.

The square root of 72351743 is about 8505.9827768460. The cubic root of 72351743 is about 416.6931226579.

The spelling of 72351743 in words is "seventy-two million, three hundred fifty-one thousand, seven hundred forty-three".