1898266997 has 12 divisors (see below), whose sum is σ = 2088091488. Its totient is φ = 1724401800.

The previous prime is 1898266969. The next prime is 1898267047. The reversal of 1898266997 is 7996628981.

It is not a de Polignac number, because 1898266997 - 2¹⁰ = 1898265973 is a prime.

It is a super-3 number, since 3×1898266997³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898268997) 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, 180128 + ... + 190374.

It is an arithmetic number, because the mean of its divisors is an integer number (174007624).

Almost surely, 2^1898266997 is an apocalyptic number.

It is an amenable number.

1898266997 is a deficient number, since it is larger than the sum of its proper divisors (189824491).

1898266997 is a wasteful number, since it uses less digits than its factorization.

1898266997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11800 (or 11789 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 65.

The square root of 1898266997 is about 43569.1059926641. The cubic root of 1898266997 is about 1238.1856480239.

The spelling of 1898266997 in words is "one billion, eight hundred ninety-eight million, two hundred sixty-six thousand, nine hundred ninety-seven".