1981074419 has 8 divisors (see below), whose sum is σ = 2055270000. Its totient is φ = 1907271072.

The previous prime is 1981074391. The next prime is 1981074421. The reversal of 1981074419 is 9144701891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1981074419 is a prime.

It is a super-2 number, since 2×1981074419² = 7849311707232375122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1981074419.

It is not an unprimeable number, because it can be changed into a prime (1981074119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87749 + ... + 107990.

It is an arithmetic number, because the mean of its divisors is an integer number (256908750).

Almost surely, 2^1981074419 is an apocalyptic number.

1981074419 is a deficient number, since it is larger than the sum of its proper divisors (74195581).

1981074419 is a wasteful number, since it uses less digits than its factorization.

1981074419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196117.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1981074419 is about 44509.2621709235. The cubic root of 1981074419 is about 1255.9343251645.

The spelling of 1981074419 in words is "one billion, nine hundred eighty-one million, seventy-four thousand, four hundred nineteen".