1897071121 has 16 divisors (see below), whose sum is σ = 2082490560. Its totient is φ = 1713849280.

The previous prime is 1897071109. The next prime is 1897071139. The reversal of 1897071121 is 1211707981.

It is not a de Polignac number, because 1897071121 - 2¹⁹ = 1896546833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1897071181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2002770 + ... + 2003716.

It is an arithmetic number, because the mean of its divisors is an integer number (130155660).

Almost surely, 2^1897071121 is an apocalyptic number.

1897071121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1897071121 is a deficient number, since it is larger than the sum of its proper divisors (185419439).

1897071121 is a wasteful number, since it uses less digits than its factorization.

1897071121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904.

The product of its (nonzero) digits is 7056, while the sum is 37.

The square root of 1897071121 is about 43555.3799317604. The cubic root of 1897071121 is about 1237.9255814205.

The spelling of 1897071121 in words is "one billion, eight hundred ninety-seven million, seventy-one thousand, one hundred twenty-one".