72705343 has 4 divisors (see below), whose sum is σ = 76531960. Its totient is φ = 68878728.

The previous prime is 72705329. The next prime is 72705361. The reversal of 72705343 is 34350727.

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

It is a cyclic number.

It is not a de Polignac number, because 72705343 - 2⁹ = 72704831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72705383) 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, 1913280 + ... + 1913317.

It is an arithmetic number, because the mean of its divisors is an integer number (19132990).

Almost surely, 2^72705343 is an apocalyptic number.

72705343 is a deficient number, since it is larger than the sum of its proper divisors (3826617).

72705343 is a wasteful number, since it uses less digits than its factorization.

72705343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826616.

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 72705343 is about 8526.7428130559. The cubic root of 72705343 is about 417.3708455843.

The spelling of 72705343 in words is "seventy-two million, seven hundred five thousand, three hundred forty-three".