72642743 has 8 divisors (see below), whose sum is σ = 73644528. Its totient is φ = 71648064.

The previous prime is 72642737. The next prime is 72642797. The reversal of 72642743 is 34724627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72642743 is a prime.

It is a super-2 number, since 2×72642743² = 10553936221128098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72632743) 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 in 7 ways as a sum of consecutive naturals, for example, 20705 + ... + 23957.

It is an arithmetic number, because the mean of its divisors is an integer number (9205566).

Almost surely, 2^72642743 is an apocalyptic number.

72642743 is a deficient number, since it is larger than the sum of its proper divisors (1001785).

72642743 is a wasteful number, since it uses less digits than its factorization.

72642743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553.

The product of its digits is 56448, while the sum is 35.

The square root of 72642743 is about 8523.0712187568. The cubic root of 72642743 is about 417.2510244171.

The spelling of 72642743 in words is "seventy-two million, six hundred forty-two thousand, seven hundred forty-three".