2091669451 has 4 divisors (see below), whose sum is σ = 2091907512. Its totient is φ = 2091431392.

The previous prime is 2091669431. The next prime is 2091669467. The reversal of 2091669451 is 1549661902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2091669451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2091669398 and 2091669407.

It is not an unprimeable number, because it can be changed into a prime (2091669401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105325 + ... + 123598.

It is an arithmetic number, because the mean of its divisors is an integer number (522976878).

Almost surely, 2^2091669451 is an apocalyptic number.

2091669451 is a deficient number, since it is larger than the sum of its proper divisors (238061).

2091669451 is an equidigital number, since it uses as much as digits as its factorization.

2091669451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238060.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 2091669451 is about 45734.7728867215. The cubic root of 2091669451 is about 1278.8835991219.

The spelling of 2091669451 in words is "two billion, ninety-one million, six hundred sixty-nine thousand, four hundred fifty-one".