1940813629 has 4 divisors (see below), whose sum is σ = 1982107584. Its totient is φ = 1899519676.

The previous prime is 1940813627. The next prime is 1940813663. The reversal of 1940813629 is 9263180491.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9263180491 = 3221 ⋅2875871.

It is a cyclic number.

It is not a de Polignac number, because 1940813629 - 2¹ = 1940813627 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940813627) 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, 20646907 + ... + 20647000.

It is an arithmetic number, because the mean of its divisors is an integer number (495526896).

Almost surely, 2^1940813629 is an apocalyptic number.

It is an amenable number.

1940813629 is a deficient number, since it is larger than the sum of its proper divisors (41293955).

1940813629 is an equidigital number, since it uses as much as digits as its factorization.

1940813629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41293954.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 1940813629 is about 44054.6663703177. Note that the first 3 decimals coincide. The cubic root of 1940813629 is about 1247.3680362898.

The spelling of 1940813629 in words is "one billion, nine hundred forty million, eight hundred thirteen thousand, six hundred twenty-nine".