1945575797 has 4 divisors (see below), whose sum is σ = 2122446336. Its totient is φ = 1768705260.

The previous prime is 1945575787. The next prime is 1945575811. The reversal of 1945575797 is 7975755491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1945575797 - 2⁶ = 1945575733 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 (1945575767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88435253 + ... + 88435274.

It is an arithmetic number, because the mean of its divisors is an integer number (530611584).

Almost surely, 2^1945575797 is an apocalyptic number.

It is an amenable number.

1945575797 is a deficient number, since it is larger than the sum of its proper divisors (176870539).

1945575797 is a wasteful number, since it uses less digits than its factorization.

1945575797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176870538.

The product of its digits is 13891500, while the sum is 59.

The square root of 1945575797 is about 44108.6816511217. The cubic root of 1945575797 is about 1248.3874239333.

The spelling of 1945575797 in words is "one billion, nine hundred forty-five million, five hundred seventy-five thousand, seven hundred ninety-seven".