72149347 has 2 divisors, whose sum is σ = 72149348. Its totient is φ = 72149346.

The previous prime is 72149339. The next prime is 72149393. The reversal of 72149347 is 74394127.

It is a weak prime.

It is an emirp because it is prime and its reverse (74394127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72149347 - 2³ = 72149339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72149447) 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, 36074673 + 36074674.

It is an arithmetic number, because the mean of its divisors is an integer number (36074674).

Almost surely, 2^72149347 is an apocalyptic number.

72149347 is a deficient number, since it is larger than the sum of its proper divisors (1).

72149347 is an equidigital number, since it uses as much as digits as its factorization.

72149347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 72149347 is about 8494.0771717709. The cubic root of 72149347 is about 416.3042088075.

It can be divided in two parts, 7214 and 9347, that added together give a palindrome (16561).

The spelling of 72149347 in words is "seventy-two million, one hundred forty-nine thousand, three hundred forty-seven".