1331122987 has 2 divisors, whose sum is σ = 1331122988. Its totient is φ = 1331122986.

The previous prime is 1331122973. The next prime is 1331122993. The reversal of 1331122987 is 7892211331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331122987 - 2¹¹ = 1331120939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331122927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665561493 + 665561494.

It is an arithmetic number, because the mean of its divisors is an integer number (665561494).

Almost surely, 2^1331122987 is an apocalyptic number.

1331122987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331122987 is an equidigital number, since it uses as much as digits as its factorization.

1331122987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 1331122987 is about 36484.5581993259. The cubic root of 1331122987 is about 1100.0338796728.

The spelling of 1331122987 in words is "one billion, three hundred thirty-one million, one hundred twenty-two thousand, nine hundred eighty-seven".