10369991 has 4 divisors (see below), whose sum is σ = 10915800. Its totient is φ = 9824184.

The previous prime is 10369981. The next prime is 10369999. The reversal of 10369991 is 19996301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10369991 - 2¹⁸ = 10107847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10369999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272876 + ... + 272913.

It is an arithmetic number, because the mean of its divisors is an integer number (2728950).

Almost surely, 2^10369991 is an apocalyptic number.

10369991 is a deficient number, since it is larger than the sum of its proper divisors (545809).

10369991 is an equidigital number, since it uses as much as digits as its factorization.

10369991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545808.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 10369991 is about 3220.2470402129. The cubic root of 10369991 is about 218.0684281443.

The spelling of 10369991 in words is "ten million, three hundred sixty-nine thousand, nine hundred ninety-one".