72111293 has 2 divisors, whose sum is σ = 72111294. Its totient is φ = 72111292.

The previous prime is 72111283. The next prime is 72111307. The reversal of 72111293 is 39211127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57350329 + 14760964 = 7573^2 + 3842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72111293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72111223) 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 as a sum of consecutive naturals, namely, 36055646 + 36055647.

It is an arithmetic number, because the mean of its divisors is an integer number (36055647).

Almost surely, 2^72111293 is an apocalyptic number.

It is an amenable number.

72111293 is a deficient number, since it is larger than the sum of its proper divisors (1).

72111293 is an equidigital number, since it uses as much as digits as its factorization.

72111293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 26.

The square root of 72111293 is about 8491.8368448764. The cubic root of 72111293 is about 416.2310049739.

The spelling of 72111293 in words is "seventy-two million, one hundred eleven thousand, two hundred ninety-three".