74319649 has 2 divisors, whose sum is σ = 74319650. Its totient is φ = 74319648.

The previous prime is 74319577. The next prime is 74319653. The reversal of 74319649 is 94691347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 2663424 = 8465^2 + 1632^2 .

It is an emirp because it is prime and its reverse (94691347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74319649 - 2⁷ = 74319521 is a prime.

It is not a weakly prime, because it can be changed into another prime (74311649) 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, 37159824 + 37159825.

It is an arithmetic number, because the mean of its divisors is an integer number (37159825).

Almost surely, 2^74319649 is an apocalyptic number.

It is an amenable number.

74319649 is a deficient number, since it is larger than the sum of its proper divisors (1).

74319649 is an equidigital number, since it uses as much as digits as its factorization.

74319649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 74319649 is about 8620.8844673850. The cubic root of 74319649 is about 420.4372788893.

The spelling of 74319649 in words is "seventy-four million, three hundred nineteen thousand, six hundred forty-nine".