6198449381 has 2 divisors, whose sum is σ = 6198449382. Its totient is φ = 6198449380.

The previous prime is 6198449359. The next prime is 6198449399. The reversal of 6198449381 is 1839448916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6198412900 + 36481 = 78730^2 + 191^2 .

It is a cyclic number.

It is not a de Polignac number, because 6198449381 - 2²² = 6194255077 is a prime.

It is a super-2 number, since 2×6198449381² = 76841549457638566322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6198449311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3099224690 + 3099224691.

It is an arithmetic number, because the mean of its divisors is an integer number (3099224691).

Almost surely, 2^6198449381 is an apocalyptic number.

It is an amenable number.

6198449381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6198449381 is an equidigital number, since it uses as much as digits as its factorization.

6198449381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 53.

The square root of 6198449381 is about 78730.2316838964. The cubic root of 6198449381 is about 1836.9373852279.

The spelling of 6198449381 in words is "six billion, one hundred ninety-eight million, four hundred forty-nine thousand, three hundred eighty-one".