74821489 has 2 divisors, whose sum is σ = 74821490. Its totient is φ = 74821488.

The previous prime is 74821469. The next prime is 74821493. The reversal of 74821489 is 98412847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62536464 + 12285025 = 7908^2 + 3505^2 .

It is a cyclic number.

It is not a de Polignac number, because 74821489 - 2⁵ = 74821457 is a prime.

It is not a weakly prime, because it can be changed into another prime (74821469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37410744 + 37410745.

It is an arithmetic number, because the mean of its divisors is an integer number (37410745).

Almost surely, 2^74821489 is an apocalyptic number.

It is an amenable number.

74821489 is a deficient number, since it is larger than the sum of its proper divisors (1).

74821489 is an equidigital number, since it uses as much as digits as its factorization.

74821489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 74821489 is about 8649.9415604962. The cubic root of 74821489 is about 421.3814846066.

The spelling of 74821489 in words is "seventy-four million, eight hundred twenty-one thousand, four hundred eighty-nine".