999648542 has 8 divisors (see below), whose sum is σ = 1507324032. Its totient is φ = 497207200.

The previous prime is 999648523. The next prime is 999648553. The reversal of 999648542 is 245846999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a pancake number, because a pancake can be divided into 999648542 parts by 44713 straight cuts.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308059 + ... + 1308822.

It is an arithmetic number, because the mean of its divisors is an integer number (188415504).

Almost surely, 2^999648542 is an apocalyptic number.

999648542 is a deficient number, since it is larger than the sum of its proper divisors (507675490).

999648542 is a wasteful number, since it uses less digits than its factorization.

999648542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617074.

The product of its digits is 5598720, while the sum is 56.

The square root of 999648542 is about 31617.2190744221. The cubic root of 999648542 is about 999.8828336059.

The spelling of 999648542 in words is "nine hundred ninety-nine million, six hundred forty-eight thousand, five hundred forty-two".