1009987995 has 16 divisors (see below), whose sum is σ = 1618631712. Its totient is φ = 537776640.

The previous prime is 1009987991. The next prime is 1009988047. The reversal of 1009987995 is 5997899001.

It is not a de Polignac number, because 1009987995 - 2² = 1009987991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1009987991) 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, 45726 + ... + 64115.

It is an arithmetic number, because the mean of its divisors is an integer number (101164482).

Almost surely, 2^1009987995 is an apocalyptic number.

1009987995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1009987995 is a deficient number, since it is larger than the sum of its proper divisors (608643717).

1009987995 is a wasteful number, since it uses less digits than its factorization.

1009987995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110462.

The product of its (nonzero) digits is 1837080, while the sum is 57.

The square root of 1009987995 is about 31780.3082898829. The cubic root of 1009987995 is about 1003.3183083171.

The spelling of 1009987995 in words is "one billion, nine million, nine hundred eighty-seven thousand, nine hundred ninety-five".