73447969 has 4 divisors (see below), whose sum is σ = 83940544. Its totient is φ = 62955396.

The previous prime is 73447967. The next prime is 73447987. The reversal of 73447969 is 96974437.

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 73447969 - 2¹ = 73447967 is a prime.

It is a super-2 number, since 2×73447969² = 10789208300449922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73447967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5246277 + ... + 5246290.

It is an arithmetic number, because the mean of its divisors is an integer number (20985136).

Almost surely, 2^73447969 is an apocalyptic number.

It is an amenable number.

73447969 is a deficient number, since it is larger than the sum of its proper divisors (10492575).

73447969 is a wasteful number, since it uses less digits than its factorization.

73447969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10492574.

The product of its digits is 1143072, while the sum is 49.

The square root of 73447969 is about 8570.1790529720. The cubic root of 73447969 is about 418.7870692958.

The spelling of 73447969 in words is "seventy-three million, four hundred forty-seven thousand, nine hundred sixty-nine".