74880409 has 2 divisors, whose sum is σ = 74880410. Its totient is φ = 74880408.

The previous prime is 74880383. The next prime is 74880413. The reversal of 74880409 is 90408847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43520409 + 31360000 = 6597^2 + 5600^2 .

It is an emirp because it is prime and its reverse (90408847) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74880409 is a prime.

It is not a weakly prime, because it can be changed into another prime (74880809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37440204 + 37440205.

It is an arithmetic number, because the mean of its divisors is an integer number (37440205).

Almost surely, 2^74880409 is an apocalyptic number.

It is an amenable number.

74880409 is a deficient number, since it is larger than the sum of its proper divisors (1).

74880409 is an equidigital number, since it uses as much as digits as its factorization.

74880409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 74880409 is about 8653.3466936209. The cubic root of 74880409 is about 421.4920646158.

The spelling of 74880409 in words is "seventy-four million, eight hundred eighty thousand, four hundred nine".