1063939691 has 4 divisors (see below), whose sum is σ = 1064065272. Its totient is φ = 1063814112.

The previous prime is 1063939661. The next prime is 1063939697. The reversal of 1063939691 is 1969393601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1063939691 - 2¹⁴ = 1063923307 is a prime.

It is a super-2 number, since 2×1063939691² = 2263935332170350962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1063939697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49085 + ... + 67358.

It is an arithmetic number, because the mean of its divisors is an integer number (266016318).

Almost surely, 2^1063939691 is an apocalyptic number.

1063939691 is a deficient number, since it is larger than the sum of its proper divisors (125581).

1063939691 is an equidigital number, since it uses as much as digits as its factorization.

1063939691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125580.

The product of its (nonzero) digits is 236196, while the sum is 47.

The square root of 1063939691 is about 32618.0884019895. The cubic root of 1063939691 is about 1020.8744554767.

The spelling of 1063939691 in words is "one billion, sixty-three million, nine hundred thirty-nine thousand, six hundred ninety-one".