1716990121 has 24 divisors (see below), whose sum is σ = 2177931392. Its totient is φ = 1324857600.

The previous prime is 1716990103. The next prime is 1716990131. The reversal of 1716990121 is 1210996171.

It is not a de Polignac number, because 1716990121 - 2¹¹ = 1716988073 is a prime.

It is a super-2 number, since 2×1716990121² = 5896110151223189282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1716990131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77401 + ... + 97081.

Almost surely, 2^1716990121 is an apocalyptic number.

1716990121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1716990121 is a deficient number, since it is larger than the sum of its proper divisors (460941271).

1716990121 is a wasteful number, since it uses less digits than its factorization.

1716990121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19813 (or 19802 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 37.

The square root of 1716990121 is about 41436.5795041048. The cubic root of 1716990121 is about 1197.4459849271.

The spelling of 1716990121 in words is "one billion, seven hundred sixteen million, nine hundred ninety thousand, one hundred twenty-one".