72011113 has 4 divisors (see below), whose sum is σ = 72096388. Its totient is φ = 71925840.

The previous prime is 72011101. The next prime is 72011119. The reversal of 72011113 is 31111027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31111027 = 1087 ⋅28621.

It can be written as a sum of positive squares in 2 ways, for example, as 37295449 + 34715664 = 6107^2 + 5892^2 .

It is a cyclic number.

It is not a de Polignac number, because 72011113 - 2¹³ = 72002921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72011119) 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, 41358 + ... + 43063.

It is an arithmetic number, because the mean of its divisors is an integer number (18024097).

Almost surely, 2^72011113 is an apocalyptic number.

It is an amenable number.

72011113 is a deficient number, since it is larger than the sum of its proper divisors (85275).

72011113 is an equidigital number, since it uses as much as digits as its factorization.

72011113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85274.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 72011113 is about 8485.9361887773. The cubic root of 72011113 is about 416.0381671866.

The spelling of 72011113 in words is "seventy-two million, eleven thousand, one hundred thirteen".