1939391269 has 4 divisors (see below), whose sum is σ = 2006266860. Its totient is φ = 1872515680.

The previous prime is 1939391249. The next prime is 1939391273. The reversal of 1939391269 is 9621939391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 856323169 + 1083068100 = 29263^2 + 32910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1939391269 - 2¹³ = 1939383077 is a prime.

It is a super-2 number, since 2×1939391269² = 7522476988546860722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939391249) 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, 33437752 + ... + 33437809.

It is an arithmetic number, because the mean of its divisors is an integer number (501566715).

Almost surely, 2^1939391269 is an apocalyptic number.

It is an amenable number.

1939391269 is a deficient number, since it is larger than the sum of its proper divisors (66875591).

1939391269 is an equidigital number, since it uses as much as digits as its factorization.

1939391269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66875590.

The product of its digits is 708588, while the sum is 52.

The square root of 1939391269 is about 44038.5202862222. The cubic root of 1939391269 is about 1247.0632431574.

The spelling of 1939391269 in words is "one billion, nine hundred thirty-nine million, three hundred ninety-one thousand, two hundred sixty-nine".