1667023449 has 32 divisors (see below), whose sum is σ = 2776488960. Its totient is φ = 866175552.

The previous prime is 1667023439. The next prime is 1667023459. The reversal of 1667023449 is 9443207661.

It is an interprime number because it is at equal distance from previous prime (1667023439) and next prime (1667023459).

It is not a de Polignac number, because 1667023449 - 2¹¹ = 1667021401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1667023449.

It is not an unprimeable number, because it can be changed into a prime (1667023439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27279 + ... + 63860.

It is an arithmetic number, because the mean of its divisors is an integer number (86765280).

Almost surely, 2^1667023449 is an apocalyptic number.

It is an amenable number.

1667023449 is a deficient number, since it is larger than the sum of its proper divisors (1109465511).

1667023449 is a wasteful number, since it uses less digits than its factorization.

1667023449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91229.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 1667023449 is about 40829.1984858875. The cubic root of 1667023449 is about 1185.7156979066.

The spelling of 1667023449 in words is "one billion, six hundred sixty-seven million, twenty-three thousand, four hundred forty-nine".