1998351453 has 16 divisors (see below), whose sum is σ = 3047496320. Its totient is φ = 1141019136.

The previous prime is 1998351437. The next prime is 1998351461. The reversal of 1998351453 is 3541538991.

It is not a de Polignac number, because 1998351453 - 2⁴ = 1998351437 is a prime.

It is a super-2 number, since 2×1998351453² = 7986817059414422418, which contains 22 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 (1998351403) 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, 9448 + ... + 63921.

It is an arithmetic number, because the mean of its divisors is an integer number (190468520).

Almost surely, 2^1998351453 is an apocalyptic number.

It is an amenable number.

1998351453 is a deficient number, since it is larger than the sum of its proper divisors (1049144867).

1998351453 is a wasteful number, since it uses less digits than its factorization.

1998351453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74676.

The product of its digits is 583200, while the sum is 48.

The square root of 1998351453 is about 44702.9244345378. The cubic root of 1998351453 is about 1259.5747815597.

The spelling of 1998351453 in words is "one billion, nine hundred ninety-eight million, three hundred fifty-one thousand, four hundred fifty-three".