1188963641 has 2 divisors, whose sum is σ = 1188963642. Its totient is φ = 1188963640.

The previous prime is 1188963637. The next prime is 1188963673. The reversal of 1188963641 is 1463698811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1142778025 + 46185616 = 33805^2 + 6796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188963641 - 2² = 1188963637 is a prime.

It is a super-4 number, since 4×1188963641⁴ (a number of 37 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (1188963691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594481820 + 594481821.

It is an arithmetic number, because the mean of its divisors is an integer number (594481821).

Almost surely, 2^1188963641 is an apocalyptic number.

It is an amenable number.

1188963641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188963641 is an equidigital number, since it uses as much as digits as its factorization.

1188963641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 47.

The square root of 1188963641 is about 34481.3520761585. The cubic root of 1188963641 is about 1059.3907858654.

The spelling of 1188963641 in words is "one billion, one hundred eighty-eight million, nine hundred sixty-three thousand, six hundred forty-one".