72246929 has 2 divisors, whose sum is σ = 72246930. Its totient is φ = 72246928.

The previous prime is 72246919. The next prime is 72246931. The reversal of 72246929 is 92964227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50410000 + 21836929 = 7100^2 + 4673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72246929 is a prime.

Together with 72246931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72246919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36123464 + 36123465.

It is an arithmetic number, because the mean of its divisors is an integer number (36123465).

Almost surely, 2^72246929 is an apocalyptic number.

It is an amenable number.

72246929 is a deficient number, since it is larger than the sum of its proper divisors (1).

72246929 is an equidigital number, since it uses as much as digits as its factorization.

72246929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 72246929 is about 8499.8193510215. The cubic root of 72246929 is about 416.4918080868.

The spelling of 72246929 in words is "seventy-two million, two hundred forty-six thousand, nine hundred twenty-nine".