999431474 has 4 divisors (see below), whose sum is σ = 1499147214. Its totient is φ = 499715736.

The previous prime is 999431473. The next prime is 999431491. The reversal of 999431474 is 474134999.

999431474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 474134999 = 13 ⋅36471923.

It can be written as a sum of positive squares in only one way, i.e., 999002449 + 429025 = 31607^2 + 655^2 .

It is not an unprimeable number, because it can be changed into a prime (999431473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249857867 + ... + 249857870.

Almost surely, 2^999431474 is an apocalyptic number.

999431474 is a deficient number, since it is larger than the sum of its proper divisors (499715740).

999431474 is a wasteful number, since it uses less digits than its factorization.

999431474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499715739.

The product of its digits is 979776, while the sum is 50.

The square root of 999431474 is about 31613.7861383290. The cubic root of 999431474 is about 999.8104554085.

The spelling of 999431474 in words is "nine hundred ninety-nine million, four hundred thirty-one thousand, four hundred seventy-four".