72070343 has 4 divisors (see below), whose sum is σ = 72214128. Its totient is φ = 71926560.

The previous prime is 72070309. The next prime is 72070351. The reversal of 72070343 is 34307027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34307027 = 19 ⋅1805633.

It is a cyclic number.

It is not a de Polignac number, because 72070343 - 2¹⁸ = 71808199 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 (72070373) 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, 71138 + ... + 72143.

It is an arithmetic number, because the mean of its divisors is an integer number (18053532).

Almost surely, 2^72070343 is an apocalyptic number.

72070343 is a deficient number, since it is larger than the sum of its proper divisors (143785).

72070343 is a wasteful number, since it uses less digits than its factorization.

72070343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143784.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 72070343 is about 8489.4253633565. The cubic root of 72070343 is about 416.1522013803.

The spelling of 72070343 in words is "seventy-two million, seventy thousand, three hundred forty-three".