74649863 has 2 divisors, whose sum is σ = 74649864. Its totient is φ = 74649862.

The previous prime is 74649847. The next prime is 74649871. The reversal of 74649863 is 36894647.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74649863 - 2⁴ = 74649847 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74649823) 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, 37324931 + 37324932.

It is an arithmetic number, because the mean of its divisors is an integer number (37324932).

Almost surely, 2^74649863 is an apocalyptic number.

74649863 is a deficient number, since it is larger than the sum of its proper divisors (1).

74649863 is an equidigital number, since it uses as much as digits as its factorization.

74649863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 47.

The square root of 74649863 is about 8640.0152198940. The cubic root of 74649863 is about 421.0590487830.

The spelling of 74649863 in words is "seventy-four million, six hundred forty-nine thousand, eight hundred sixty-three".