72307049 has 2 divisors, whose sum is σ = 72307050. Its totient is φ = 72307048.

The previous prime is 72307033. The next prime is 72307051. The reversal of 72307049 is 94070327.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 20539024 = 7195^2 + 4532^2 .

It is a cyclic number.

It is not a de Polignac number, because 72307049 - 2⁴ = 72307033 is a prime.

Together with 72307051, 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 (72307019) 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, 36153524 + 36153525.

It is an arithmetic number, because the mean of its divisors is an integer number (36153525).

Almost surely, 2^72307049 is an apocalyptic number.

It is an amenable number.

72307049 is a deficient number, since it is larger than the sum of its proper divisors (1).

72307049 is an equidigital number, since it uses as much as digits as its factorization.

72307049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 72307049 is about 8503.3551613466. The cubic root of 72307049 is about 416.6073034006.

The spelling of 72307049 in words is "seventy-two million, three hundred seven thousand, forty-nine".