13071998 has 4 divisors (see below), whose sum is σ = 19608000. Its totient is φ = 6535998.

The previous prime is 13071979. The next prime is 13072009. The reversal of 13071998 is 89917031.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3267998 + ... + 3268001.

It is an arithmetic number, because the mean of its divisors is an integer number (4902000).

Almost surely, 2^13071998 is an apocalyptic number.

13071998 is a deficient number, since it is larger than the sum of its proper divisors (6536002).

13071998 is an equidigital number, since it uses as much as digits as its factorization.

13071998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536001.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 13071998 is about 3615.5218157273. The cubic root of 13071998 is about 235.5667503711.

The spelling of 13071998 in words is "thirteen million, seventy-one thousand, nine hundred ninety-eight".