72675649 has 2 divisors, whose sum is σ = 72675650. Its totient is φ = 72675648.

The previous prime is 72675593. The next prime is 72675679. The reversal of 72675649 is 94657627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46991025 + 25684624 = 6855^2 + 5068^2 .

It is a cyclic number.

It is not a de Polignac number, because 72675649 - 2⁷ = 72675521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72675599 and 72675608.

It is not a weakly prime, because it can be changed into another prime (72675679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36337824 + 36337825.

It is an arithmetic number, because the mean of its divisors is an integer number (36337825).

Almost surely, 2^72675649 is an apocalyptic number.

It is an amenable number.

72675649 is a deficient number, since it is larger than the sum of its proper divisors (1).

72675649 is an equidigital number, since it uses as much as digits as its factorization.

72675649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 46.

The square root of 72675649 is about 8525.0014076245. The cubic root of 72675649 is about 417.3140175852.

The spelling of 72675649 in words is "seventy-two million, six hundred seventy-five thousand, six hundred forty-nine".