1231112977 has 2 divisors, whose sum is σ = 1231112978. Its totient is φ = 1231112976.

The previous prime is 1231112969. The next prime is 1231113061. The reversal of 1231112977 is 7792111321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171761361 + 59351616 = 34231^2 + 7704^2 .

It is an emirp because it is prime and its reverse (7792111321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231112977 - 2³ = 1231112969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231112917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615556488 + 615556489.

It is an arithmetic number, because the mean of its divisors is an integer number (615556489).

Almost surely, 2^1231112977 is an apocalyptic number.

It is an amenable number.

1231112977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231112977 is an equidigital number, since it uses as much as digits as its factorization.

1231112977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 34.

The square root of 1231112977 is about 35087.2195678141. The cubic root of 1231112977 is about 1071.7643401494.

The spelling of 1231112977 in words is "one billion, two hundred thirty-one million, one hundred twelve thousand, nine hundred seventy-seven".