72193879 has 2 divisors, whose sum is σ = 72193880. Its totient is φ = 72193878.

The previous prime is 72193873. The next prime is 72193909. The reversal of 72193879 is 97839127.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72193879 - 2¹¹ = 72191831 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72193873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36096939 + 36096940.

It is an arithmetic number, because the mean of its divisors is an integer number (36096940).

Almost surely, 2^72193879 is an apocalyptic number.

72193879 is a deficient number, since it is larger than the sum of its proper divisors (1).

72193879 is an equidigital number, since it uses as much as digits as its factorization.

72193879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 72193879 is about 8496.6981233889. The cubic root of 72193879 is about 416.3898415814.

The spelling of 72193879 in words is "seventy-two million, one hundred ninety-three thousand, eight hundred seventy-nine".