1890930897 has 12 divisors (see below), whose sum is σ = 2752196304. Its totient is φ = 1250996760.

The previous prime is 1890930869. The next prime is 1890930911. The reversal of 1890930897 is 7980390981.

It is not a de Polignac number, because 1890930897 - 2⁸ = 1890930641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1890930397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 800743 + ... + 803100.

It is an arithmetic number, because the mean of its divisors is an integer number (229349692).

Almost surely, 2^1890930897 is an apocalyptic number.

It is an amenable number.

1890930897 is a deficient number, since it is larger than the sum of its proper divisors (861265407).

1890930897 is a wasteful number, since it uses less digits than its factorization.

1890930897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603980 (or 1603977 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 1890930897 is about 43484.8352532236. The cubic root of 1890930897 is about 1236.5885456262.

The spelling of 1890930897 in words is "one billion, eight hundred ninety million, nine hundred thirty thousand, eight hundred ninety-seven".