1199009901 has 24 divisors (see below), whose sum is σ = 1699881120. Its totient is φ = 750843072.

The previous prime is 1199009789. The next prime is 1199009923. The reversal of 1199009901 is 1099009911.

It is not a de Polignac number, because 1199009901 - 2¹³ = 1199001709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1199009901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199009951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114070 + ... + 124136.

It is an arithmetic number, because the mean of its divisors is an integer number (70828380).

Almost surely, 2^1199009901 is an apocalyptic number.

It is an amenable number.

1199009901 is a deficient number, since it is larger than the sum of its proper divisors (500871219).

1199009901 is a wasteful number, since it uses less digits than its factorization.

1199009901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10173 (or 10136 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 39.

The square root of 1199009901 is about 34626.7223542743. The cubic root of 1199009901 is about 1062.3662284365.

The spelling of 1199009901 in words is "one billion, one hundred ninety-nine million, nine thousand, nine hundred one".