999787942 has 32 divisors (see below), whose sum is σ = 1599897600. Its totient is φ = 467244288.

The previous prime is 999787909. The next prime is 999787949. The reversal of 999787942 is 249787999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999787949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1075734 + ... + 1076662.

It is an arithmetic number, because the mean of its divisors is an integer number (49996800).

Almost surely, 2^999787942 is an apocalyptic number.

999787942 is a deficient number, since it is larger than the sum of its proper divisors (600109658).

999787942 is a wasteful number, since it uses less digits than its factorization.

999787942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300.

The product of its digits is 20575296, while the sum is 64.

The square root of 999787942 is about 31619.4234925307. The cubic root of 999787942 is about 999.9293090029.

The spelling of 999787942 in words is "nine hundred ninety-nine million, seven hundred eighty-seven thousand, nine hundred forty-two".