1313631066 has 64 divisors (see below), whose sum is σ = 2923278336. Its totient is φ = 390196800.

The previous prime is 1313631061. The next prime is 1313631071. The reversal of 1313631066 is 6601363131.

It is an interprime number because it is at equal distance from previous prime (1313631061) and next prime (1313631071).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1313631061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 922431 + ... + 923853.

It is an arithmetic number, because the mean of its divisors is an integer number (45676224).

Almost surely, 2^1313631066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1313631066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1461639168).

1313631066 is an abundant number, since it is smaller than the sum of its proper divisors (1609647270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1313631066 is a wasteful number, since it uses less digits than its factorization.

1313631066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 1313631066 is about 36244.0486976828. The cubic root of 1313631066 is about 1095.1942042070.

Adding to 1313631066 its reverse (6601363131), we get a palindrome (7914994197).

The spelling of 1313631066 in words is "one billion, three hundred thirteen million, six hundred thirty-one thousand, sixty-six".