74947449 has 4 divisors (see below), whose sum is σ = 99929936. Its totient is φ = 49964964.

The previous prime is 74947393. The next prime is 74947451. The reversal of 74947449 is 94474947.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 74947449 - 2⁷ = 74947321 is a prime.

It is a super-2 number, since 2×74947449² = 11234240223215202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74947398 and 74947407.

It is not an unprimeable number, because it can be changed into a prime (74940449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12491239 + ... + 12491244.

It is an arithmetic number, because the mean of its divisors is an integer number (24982484).

Almost surely, 2^74947449 is an apocalyptic number.

It is an amenable number.

74947449 is a deficient number, since it is larger than the sum of its proper divisors (24982487).

74947449 is a wasteful number, since it uses less digits than its factorization.

74947449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24982486.

The product of its digits is 1016064, while the sum is 48.

The square root of 74947449 is about 8657.2194727869. The cubic root of 74947449 is about 421.6178135705.

The spelling of 74947449 in words is "seventy-four million, nine hundred forty-seven thousand, four hundred forty-nine".