1940545997 has 8 divisors (see below), whose sum is σ = 2092038816. Its totient is φ = 1789370352.

The previous prime is 1940545973. The next prime is 1940546063. The reversal of 1940545997 is 7995450491.

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 1940545997 - 2⁸ = 1940545741 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 (1940545907) 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, 66503 + ... + 91124.

It is an arithmetic number, because the mean of its divisors is an integer number (261504852).

Almost surely, 2^1940545997 is an apocalyptic number.

It is an amenable number.

1940545997 is a deficient number, since it is larger than the sum of its proper divisors (151492819).

1940545997 is a wasteful number, since it uses less digits than its factorization.

1940545997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158587.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The square root of 1940545997 is about 44051.6287667096. The cubic root of 1940545997 is about 1247.3106976315.

The spelling of 1940545997 in words is "one billion, nine hundred forty million, five hundred forty-five thousand, nine hundred ninety-seven".