72042379 has 4 divisors (see below), whose sum is σ = 76280184. Its totient is φ = 67804576.

The previous prime is 72042361. The next prime is 72042389. The reversal of 72042379 is 97324027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97324027 = 7229 ⋅13463.

It is a cyclic number.

It is not a de Polignac number, because 72042379 - 2¹⁵ = 72009611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72042349) 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 3 ways as a sum of consecutive naturals, for example, 2118877 + ... + 2118910.

It is an arithmetic number, because the mean of its divisors is an integer number (19070046).

Almost surely, 2^72042379 is an apocalyptic number.

72042379 is a deficient number, since it is larger than the sum of its proper divisors (4237805).

72042379 is a wasteful number, since it uses less digits than its factorization.

72042379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237804.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 72042379 is about 8487.7782134078. The cubic root of 72042379 is about 416.0983707054.

The spelling of 72042379 in words is "seventy-two million, forty-two thousand, three hundred seventy-nine".