1013219991 has 36 divisors (see below), whose sum is σ = 1705337400. Its totient is φ = 578013408.

The previous prime is 1013219969. The next prime is 1013219993. The reversal of 1013219991 is 1999123101.

It is not a de Polignac number, because 1013219991 - 2⁷ = 1013219863 is a prime.

It is a super-2 number, since 2×1013219991² = 2053229500324080162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013219993) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 324345 + ... + 327453.

Almost surely, 2^1013219991 is an apocalyptic number.

1013219991 is a deficient number, since it is larger than the sum of its proper divisors (692117409).

1013219991 is a wasteful number, since it uses less digits than its factorization.

1013219991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868 (or 3858 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The square root of 1013219991 is about 31831.1167099114. The cubic root of 1013219991 is about 1004.3873863565.

The spelling of 1013219991 in words is "one billion, thirteen million, two hundred nineteen thousand, nine hundred ninety-one".