1940668031 has 4 divisors (see below), whose sum is σ = 2054824992. Its totient is φ = 1826511072.

The previous prime is 1940668027. The next prime is 1940668073. The reversal of 1940668031 is 1308660491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1308660491 = 19037 ⋅68743.

It is a cyclic number.

It is not a de Polignac number, because 1940668031 - 2² = 1940668027 is a prime.

It is a super-3 number, since 3×1940668031³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940668001) 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, 57078455 + ... + 57078488.

It is an arithmetic number, because the mean of its divisors is an integer number (513706248).

Almost surely, 2^1940668031 is an apocalyptic number.

1940668031 is a deficient number, since it is larger than the sum of its proper divisors (114156961).

1940668031 is a wasteful number, since it uses less digits than its factorization.

1940668031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114156960.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1940668031 is about 44053.0138696548. The cubic root of 1940668031 is about 1247.3368433870.

The spelling of 1940668031 in words is "one billion, nine hundred forty million, six hundred sixty-eight thousand, thirty-one".