1013073891 has 4 divisors (see below), whose sum is σ = 1350765192. Its totient is φ = 675382592.

The previous prime is 1013073889. The next prime is 1013073899. The reversal of 1013073891 is 1983703101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1983703101 = 3 ⋅661234367.

It is a cyclic number.

It is not a de Polignac number, because 1013073891 - 2¹ = 1013073889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1013073899) 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, 168845646 + ... + 168845651.

It is an arithmetic number, because the mean of its divisors is an integer number (337691298).

Almost surely, 2^1013073891 is an apocalyptic number.

1013073891 is a deficient number, since it is larger than the sum of its proper divisors (337691301).

1013073891 is an equidigital number, since it uses as much as digits as its factorization.

1013073891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337691300.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 1013073891 is about 31828.8217029786. The cubic root of 1013073891 is about 1004.3391085714.

Adding to 1013073891 its reverse (1983703101), we get a palindrome (2996776992).

The spelling of 1013073891 in words is "one billion, thirteen million, seventy-three thousand, eight hundred ninety-one".