999239672 has 8 divisors (see below), whose sum is σ = 1873574400. Its totient is φ = 499619832.

The previous prime is 999239671. The next prime is 999239701. The reversal of 999239672 is 276932999.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999239671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62452472 + ... + 62452487.

It is an arithmetic number, because the mean of its divisors is an integer number (234196800).

Almost surely, 2^999239672 is an apocalyptic number.

It is an amenable number.

999239672 is a deficient number, since it is larger than the sum of its proper divisors (874334728).

999239672 is a wasteful number, since it uses less digits than its factorization.

999239672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124904965 (or 124904961 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 56.

The square root of 999239672 is about 31610.7524744350. The cubic root of 999239672 is about 999.7464930730.

The spelling of 999239672 in words is "nine hundred ninety-nine million, two hundred thirty-nine thousand, six hundred seventy-two".