1005099100 has 18 divisors (see below), whose sum is σ = 2181065264. Its totient is φ = 402039600.

The previous prime is 1005099097. The next prime is 1005099119. The reversal of 1005099100 is 19905001.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5025396 + ... + 5025595.

Almost surely, 2^1005099100 is an apocalyptic number.

1005099100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005099100 is an abundant number, since it is smaller than the sum of its proper divisors (1175966164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005099100 is a wasteful number, since it uses less digits than its factorization.

1005099100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051005 (or 10050998 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 1005099100 is about 31703.2979357038. The cubic root of 1005099100 is about 1001.6968191762.

The spelling of 1005099100 in words is "one billion, five million, ninety-nine thousand, one hundred".