1091409902 has 8 divisors (see below), whose sum is σ = 1785943512. Its totient is φ = 496095400.

The previous prime is 1091409887. The next prime is 1091409919. The reversal of 1091409902 is 2099041901.

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

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, 24804749 + ... + 24804792.

It is an arithmetic number, because the mean of its divisors is an integer number (223242939).

Almost surely, 2^1091409902 is an apocalyptic number.

1091409902 is a deficient number, since it is larger than the sum of its proper divisors (694533610).

1091409902 is a wasteful number, since it uses less digits than its factorization.

1091409902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49609554.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 1091409902 is about 33036.4934882623. The cubic root of 1091409902 is about 1029.5860032254.

The spelling of 1091409902 in words is "one billion, ninety-one million, four hundred nine thousand, nine hundred two".