74981969 has 2 divisors, whose sum is σ = 74981970. Its totient is φ = 74981968.

The previous prime is 74981957. The next prime is 74982013. The reversal of 74981969 is 96918947.

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., 60450625 + 14531344 = 7775^2 + 3812^2 .

It is a cyclic number.

It is not a de Polignac number, because 74981969 - 2⁴ = 74981953 is a prime.

It is a super-2 number, since 2×74981969² = 11244591350233922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74981969.

It is not a weakly prime, because it can be changed into another prime (74981939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37490984 + 37490985.

It is an arithmetic number, because the mean of its divisors is an integer number (37490985).

Almost surely, 2^74981969 is an apocalyptic number.

It is an amenable number.

74981969 is a deficient number, since it is larger than the sum of its proper divisors (1).

74981969 is an equidigital number, since it uses as much as digits as its factorization.

74981969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 74981969 is about 8659.2129549977. The cubic root of 74981969 is about 421.6825345325.

The spelling of 74981969 in words is "seventy-four million, nine hundred eighty-one thousand, nine hundred sixty-nine".