72234691 has 2 divisors, whose sum is σ = 72234692. Its totient is φ = 72234690.

The previous prime is 72234647. The next prime is 72234731. The reversal of 72234691 is 19643227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72234691 - 2¹⁵ = 72201923 is a prime.

It is not a weakly prime, because it can be changed into another prime (72234611) 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, 36117345 + 36117346.

It is an arithmetic number, because the mean of its divisors is an integer number (36117346).

Almost surely, 2^72234691 is an apocalyptic number.

72234691 is a deficient number, since it is larger than the sum of its proper divisors (1).

72234691 is an equidigital number, since it uses as much as digits as its factorization.

72234691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 72234691 is about 8499.0994228801. The cubic root of 72234691 is about 416.4682900649.

The spelling of 72234691 in words is "seventy-two million, two hundred thirty-four thousand, six hundred ninety-one".