12350991 has 4 divisors (see below), whose sum is σ = 16467992. Its totient is φ = 8233992.

The previous prime is 12350983. The next prime is 12351011. The reversal of 12350991 is 19905321.

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

It is not a de Polignac number, because 12350991 - 2³ = 12350983 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 (12350911) 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, 2058496 + ... + 2058501.

It is an arithmetic number, because the mean of its divisors is an integer number (4116998).

Almost surely, 2^12350991 is an apocalyptic number.

12350991 is a deficient number, since it is larger than the sum of its proper divisors (4117001).

12350991 is an equidigital number, since it uses as much as digits as its factorization.

12350991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117000.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 12350991 is about 3514.3976724326. The cubic root of 12350991 is about 231.1535681692.

The spelling of 12350991 in words is "twelve million, three hundred fifty thousand, nine hundred ninety-one".