1945490783 has 4 divisors (see below), whose sum is σ = 1967350320. Its totient is φ = 1923631248.

The previous prime is 1945490779. The next prime is 1945490791. The reversal of 1945490783 is 3870945491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1945490783 - 2² = 1945490779 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 (1945490983) 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, 10929635 + ... + 10929812.

It is an arithmetic number, because the mean of its divisors is an integer number (491837580).

Almost surely, 2^1945490783 is an apocalyptic number.

1945490783 is a deficient number, since it is larger than the sum of its proper divisors (21859537).

1945490783 is an equidigital number, since it uses as much as digits as its factorization.

1945490783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21859536.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 1945490783 is about 44107.7179527574. The cubic root of 1945490783 is about 1248.3692404639.

The spelling of 1945490783 in words is "one billion, nine hundred forty-five million, four hundred ninety thousand, seven hundred eighty-three".