10539991 has 8 divisors (see below), whose sum is σ = 13140864. Its totient is φ = 8212920.

The previous prime is 10539979. The next prime is 10540001. The reversal of 10539991 is 19993501.

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 10539991 - 2²¹ = 8442839 is a prime.

It is a super-2 number, since 2×10539991² = 222182820560162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10539991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10539941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68365 + ... + 68518.

It is an arithmetic number, because the mean of its divisors is an integer number (1642608).

Almost surely, 2^10539991 is an apocalyptic number.

10539991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10539991 is a deficient number, since it is larger than the sum of its proper divisors (2600873).

10539991 is a wasteful number, since it uses less digits than its factorization.

10539991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136901.

The product of its (nonzero) digits is 10935, while the sum is 37.

The square root of 10539991 is about 3246.5352300568. The cubic root of 10539991 is about 219.2536069429.

The spelling of 10539991 in words is "ten million, five hundred thirty-nine thousand, nine hundred ninety-one".