1940161399 has 8 divisors (see below), whose sum is σ = 2117000592. Its totient is φ = 1763399040.

The previous prime is 1940161367. The next prime is 1940161403. The reversal of 1940161399 is 9931610491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1940161399 - 2⁵ = 1940161367 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 (1940161309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42127 + ... + 75199.

It is an arithmetic number, because the mean of its divisors is an integer number (264625074).

Almost surely, 2^1940161399 is an apocalyptic number.

1940161399 is a deficient number, since it is larger than the sum of its proper divisors (176839193).

1940161399 is a wasteful number, since it uses less digits than its factorization.

1940161399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38417.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 1940161399 is about 44047.2632407508. The cubic root of 1940161399 is about 1247.2282904301.

The spelling of 1940161399 in words is "one billion, nine hundred forty million, one hundred sixty-one thousand, three hundred ninety-nine".