1990715169 has 8 divisors (see below), whose sum is σ = 2674549152. Its totient is φ = 1317012320.

The previous prime is 1990715161. The next prime is 1990715173. The reversal of 1990715169 is 9615170991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1990715169 - 2³ = 1990715161 is a prime.

It is a super-2 number, since 2×1990715169² = 7925893768173397122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990715161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2532324 + ... + 2533109.

It is an arithmetic number, because the mean of its divisors is an integer number (334318644).

Almost surely, 2^1990715169 is an apocalyptic number.

It is an amenable number.

1990715169 is a deficient number, since it is larger than the sum of its proper divisors (683833983).

1990715169 is a wasteful number, since it uses less digits than its factorization.

1990715169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065567.

The product of its (nonzero) digits is 153090, while the sum is 48.

The square root of 1990715169 is about 44617.4312236821. The cubic root of 1990715169 is about 1257.9683326584.

The spelling of 1990715169 in words is "one billion, nine hundred ninety million, seven hundred fifteen thousand, one hundred sixty-nine".