72013234 has 4 divisors (see below), whose sum is σ = 108019854. Its totient is φ = 36006616.

The previous prime is 72013223. The next prime is 72013283. The reversal of 72013234 is 43231027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43231027 = 7 ⋅6175861.

It can be written as a sum of positive squares in only one way, i.e., 41796225 + 30217009 = 6465^2 + 5497^2 .

It is a super-2 number, since 2×72013234² = 10371811742277512, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18003307 + ... + 18003310.

Almost surely, 2^72013234 is an apocalyptic number.

72013234 is a deficient number, since it is larger than the sum of its proper divisors (36006620).

72013234 is a wasteful number, since it uses less digits than its factorization.

72013234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36006619.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 72013234 is about 8486.0611593365. The cubic root of 72013234 is about 416.0422517797.

The spelling of 72013234 in words is "seventy-two million, thirteen thousand, two hundred thirty-four".