2091447 has 16 divisors (see below), whose sum is σ = 3144960. Its totient is φ = 1373400.

The previous prime is 2091443. The next prime is 2091449. The reversal of 2091447 is 7441902.

It is a happy number.

It is not a de Polignac number, because 2091447 - 2² = 2091443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2091447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372 + ... + 2462.

It is an arithmetic number, because the mean of its divisors is an integer number (196560).

2^2091447 is an apocalyptic number.

2091447 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2091447 is a deficient number, since it is larger than the sum of its proper divisors (1053513).

2091447 is a wasteful number, since it uses less digits than its factorization.

2091447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2091447 is about 1446.1835983028. The cubic root of 2091447 is about 127.8838260693.

The spelling of 2091447 in words is "two million, ninety-one thousand, four hundred forty-seven".