1971103499 has 4 divisors (see below), whose sum is σ = 1971539664. Its totient is φ = 1970667336.

The previous prime is 1971103457. The next prime is 1971103507. The reversal of 1971103499 is 9943011791.

It is a happy number.

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-1971103499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1971103439) 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, 211232 + ... + 220365.

It is an arithmetic number, because the mean of its divisors is an integer number (492884916).

Almost surely, 2^1971103499 is an apocalyptic number.

1971103499 is a deficient number, since it is larger than the sum of its proper divisors (436165).

1971103499 is an equidigital number, since it uses as much as digits as its factorization.

1971103499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436164.

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 1971103499 is about 44397.1113812599. Note that the first 3 decimals coincide. The cubic root of 1971103499 is about 1253.8237046199.

The spelling of 1971103499 in words is "one billion, nine hundred seventy-one million, one hundred three thousand, four hundred ninety-nine".