901090909 has 8 divisors (see below), whose sum is σ = 929755008. Its totient is φ = 872822400.

The previous prime is 901090877. The next prime is 901090937. The reversal of 901090909 is 909090109.

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

It is a cyclic number.

It is not a de Polignac number, because 901090909 - 2⁵ = 901090877 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

901090909 is a modest number, since divided by 90909 gives 901 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901091909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94267 + ... + 103384.

It is an arithmetic number, because the mean of its divisors is an integer number (116219376).

Almost surely, 2^901090909 is an apocalyptic number.

It is an amenable number.

901090909 is a deficient number, since it is larger than the sum of its proper divisors (28664099).

901090909 is a wasteful number, since it uses less digits than its factorization.

901090909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197795.

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 901090909 is about 30018.1763103624. The cubic root of 901090909 is about 965.8793237854.

The spelling of 901090909 in words is "nine hundred one million, ninety thousand, nine hundred nine".