10191949 has 4 divisors (see below), whose sum is σ = 10251036. Its totient is φ = 10132864.

The previous prime is 10191943. The next prime is 10191977. The reversal of 10191949 is 94919101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94919101 = 67 ⋅1416703.

It can be written as a sum of positive squares in 2 ways, for example, as 8369449 + 1822500 = 2893^2 + 1350^2 .

It is a cyclic number.

It is not a de Polignac number, because 10191949 - 2⁵ = 10191917 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 (10191943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29284 + ... + 29629.

It is an arithmetic number, because the mean of its divisors is an integer number (2562759).

Almost surely, 2^10191949 is an apocalyptic number.

It is an amenable number.

10191949 is a deficient number, since it is larger than the sum of its proper divisors (59087).

10191949 is an equidigital number, since it uses as much as digits as its factorization.

10191949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59086.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 10191949 is about 3192.4832027749. The cubic root of 10191949 is about 216.8132139407.

The spelling of 10191949 in words is "ten million, one hundred ninety-one thousand, nine hundred forty-nine".