74555977 has 2 divisors, whose sum is σ = 74555978. Its totient is φ = 74555976.

The previous prime is 74555963. The next prime is 74555993. The reversal of 74555977 is 77955547.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48177481 + 26378496 = 6941^2 + 5136^2 .

It is a cyclic number.

It is not a de Polignac number, because 74555977 - 2¹⁵ = 74523209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74555977.

It is not a weakly prime, because it can be changed into another prime (74555927) 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, 37277988 + 37277989.

It is an arithmetic number, because the mean of its divisors is an integer number (37277989).

Almost surely, 2^74555977 is an apocalyptic number.

It is an amenable number.

74555977 is a deficient number, since it is larger than the sum of its proper divisors (1).

74555977 is an equidigital number, since it uses as much as digits as its factorization.

74555977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1543500, while the sum is 49.

The square root of 74555977 is about 8634.5803024814. The cubic root of 74555977 is about 420.8824548702.

The spelling of 74555977 in words is "seventy-four million, five hundred fifty-five thousand, nine hundred seventy-seven".