10509091 has 8 divisors (see below), whose sum is σ = 10999584. Its totient is φ = 10021440.

The previous prime is 10509029. The next prime is 10509097. The reversal of 10509091 is 19090501.

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 10509091 - 2⁷ = 10508963 is a prime.

It is a super-2 number, since 2×10509091² = 220881987292562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10509097) 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, 11545 + ... + 12421.

It is an arithmetic number, because the mean of its divisors is an integer number (1374948).

Almost surely, 2^10509091 is an apocalyptic number.

10509091 is a deficient number, since it is larger than the sum of its proper divisors (490493).

10509091 is an equidigital number, since it uses as much as digits as its factorization.

10509091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421.

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

The square root of 10509091 is about 3241.7728174565. The cubic root of 10509091 is about 219.0391359206.

Adding to 10509091 its reverse (19090501), we get a palindrome (29599592).

The spelling of 10509091 in words is "ten million, five hundred nine thousand, ninety-one".