1906489475 has 18 divisors (see below), whose sum is σ = 2579940156. Its totient is φ = 1386011200.

The previous prime is 1906489457. The next prime is 1906489517. The reversal of 1906489475 is 5749846091.

It is not a de Polignac number, because 1906489475 - 2⁶ = 1906489411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 722759 + ... + 725391.

Almost surely, 2^1906489475 is an apocalyptic number.

1906489475 is a deficient number, since it is larger than the sum of its proper divisors (673450681).

1906489475 is an frugal number, since it uses more digits than its factorization.

1906489475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 1906489475 is about 43663.3653650288. The cubic root of 1906489475 is about 1239.9708358992.

The spelling of 1906489475 in words is "one billion, nine hundred six million, four hundred eighty-nine thousand, four hundred seventy-five".