1890743097 has 4 divisors (see below), whose sum is σ = 2520990800. Its totient is φ = 1260495396.

The previous prime is 1890743081. The next prime is 1890743117. The reversal of 1890743097 is 7903470981.

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 not a de Polignac number, because 1890743097 - 2⁴ = 1890743081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1890743017) 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, 315123847 + ... + 315123852.

It is an arithmetic number, because the mean of its divisors is an integer number (630247700).

Almost surely, 2^1890743097 is an apocalyptic number.

It is an amenable number.

1890743097 is a deficient number, since it is larger than the sum of its proper divisors (630247703).

1890743097 is an equidigital number, since it uses as much as digits as its factorization.

1890743097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630247702.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 1890743097 is about 43482.6758261264. The cubic root of 1890743097 is about 1236.5476065280.

The spelling of 1890743097 in words is "one billion, eight hundred ninety million, seven hundred forty-three thousand, ninety-seven".