1940651193 has 8 divisors (see below), whose sum is σ = 2786576128. Its totient is φ = 1194246864.

The previous prime is 1940651191. The next prime is 1940651231. The reversal of 1940651193 is 3911560491.

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

It is not a de Polignac number, because 1940651193 - 2¹ = 1940651191 is a prime.

It is a super-2 number, since 2×1940651193² = 7532254105784646498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 49760287 = 1940651193 / (1 + 9 + 4 + 0 + 6 + 5 + 1 + 1 + 9 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1940651191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24880105 + ... + 24880182.

It is an arithmetic number, because the mean of its divisors is an integer number (348322016).

Almost surely, 2^1940651193 is an apocalyptic number.

1940651193 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1940651193 is a deficient number, since it is larger than the sum of its proper divisors (845924935).

1940651193 is a wasteful number, since it uses less digits than its factorization.

1940651193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49760303.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 1940651193 is about 44052.8227585929. The cubic root of 1940651193 is about 1247.3332359147. Note that the first 3 decimals are identical.

The spelling of 1940651193 in words is "one billion, nine hundred forty million, six hundred fifty-one thousand, one hundred ninety-three".