1408891919 has 4 divisors (see below), whose sum is σ = 1412101680. Its totient is φ = 1405682160.

The previous prime is 1408891871. The next prime is 1408891921. The reversal of 1408891919 is 9191988041.

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-1408891919 is a prime.

It is a super-2 number, since 2×1408891919² = 3969952878847005122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1408891019) 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, 1604222 + ... + 1605099.

It is an arithmetic number, because the mean of its divisors is an integer number (353025420).

Almost surely, 2^1408891919 is an apocalyptic number.

1408891919 is a deficient number, since it is larger than the sum of its proper divisors (3209761).

1408891919 is an equidigital number, since it uses as much as digits as its factorization.

1408891919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209760.

The product of its (nonzero) digits is 186624, while the sum is 50.

The square root of 1408891919 is about 37535.2090576301. The cubic root of 1408891919 is about 1121.0523482268.

The spelling of 1408891919 in words is "one billion, four hundred eight million, eight hundred ninety-one thousand, nine hundred nineteen".