1201386663 has 12 divisors (see below), whose sum is σ = 1826670040. Its totient is φ = 758770416.

The previous prime is 1201386661. The next prime is 1201386673. The reversal of 1201386663 is 3666831021.

It is not a de Polignac number, because 1201386663 - 2¹ = 1201386661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201386661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3512656 + ... + 3512997.

Almost surely, 2^1201386663 is an apocalyptic number.

1201386663 is a deficient number, since it is larger than the sum of its proper divisors (625283377).

1201386663 is a wasteful number, since it uses less digits than its factorization.

1201386663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7025678 (or 7025675 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1201386663 is about 34661.0251290985. The cubic root of 1201386663 is about 1063.0677308759.

The spelling of 1201386663 in words is "one billion, two hundred one million, three hundred eighty-six thousand, six hundred sixty-three".