1161422987 has 2 divisors, whose sum is σ = 1161422988. Its totient is φ = 1161422986.

The previous prime is 1161422971. The next prime is 1161423037. The reversal of 1161422987 is 7892241611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161422987 - 2⁴ = 1161422971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161422947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580711493 + 580711494.

It is an arithmetic number, because the mean of its divisors is an integer number (580711494).

Almost surely, 2^1161422987 is an apocalyptic number.

1161422987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161422987 is an equidigital number, since it uses as much as digits as its factorization.

1161422987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 1161422987 is about 34079.6564976820. The cubic root of 1161422987 is about 1051.1470418805.

The spelling of 1161422987 in words is "one billion, one hundred sixty-one million, four hundred twenty-two thousand, nine hundred eighty-seven".