1031386641 has 4 divisors (see below), whose sum is σ = 1375182192. Its totient is φ = 687591092.

The previous prime is 1031386613. The next prime is 1031386661. The reversal of 1031386641 is 1466831301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1031386641 - 2⁷ = 1031386513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1031386661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171897771 + ... + 171897776.

It is an arithmetic number, because the mean of its divisors is an integer number (343795548).

Almost surely, 2^1031386641 is an apocalyptic number.

It is an amenable number.

1031386641 is a deficient number, since it is larger than the sum of its proper divisors (343795551).

1031386641 is an equidigital number, since it uses as much as digits as its factorization.

1031386641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343795550.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1031386641 is about 32115.2088736785. The cubic root of 1031386641 is about 1010.3546253326.

The spelling of 1031386641 in words is "one billion, thirty-one million, three hundred eighty-six thousand, six hundred forty-one".