1198427877 has 6 divisors (see below), whose sum is σ = 1731062502. Its totient is φ = 798951912.

The previous prime is 1198427851. The next prime is 1198427887. The reversal of 1198427877 is 7787248911.

It can be written as a sum of positive squares in only one way, i.e., 1140683076 + 57744801 = 33774^2 + 7599^2 .

It is not a de Polignac number, because 1198427877 - 2⁷ = 1198427749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198427887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66579318 + ... + 66579335.

It is an arithmetic number, because the mean of its divisors is an integer number (288510417).

Almost surely, 2^1198427877 is an apocalyptic number.

It is an amenable number.

1198427877 is a deficient number, since it is larger than the sum of its proper divisors (532634625).

1198427877 is a wasteful number, since it uses less digits than its factorization.

1198427877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133158659 (or 133158656 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 54.

The square root of 1198427877 is about 34618.3170734800. The cubic root of 1198427877 is about 1062.1943024952.

The spelling of 1198427877 in words is "one billion, one hundred ninety-eight million, four hundred twenty-seven thousand, eight hundred seventy-seven".