9951669 has 48 divisors (see below), whose sum is σ = 18345600. Its totient is φ = 5056128.

The previous prime is 9951637. The next prime is 9951701. The reversal of 9951669 is 9661599.

It is an interprime number because it is at equal distance from previous prime (9951637) and next prime (9951701).

It is not a de Polignac number, because 9951669 - 2⁵ = 9951637 is a prime.

It is a super-2 number, since 2×9951669² = 198071431771122, which contains 22 as substring.

9951669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9951569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23542 + ... + 23960.

It is an arithmetic number, because the mean of its divisors is an integer number (382200).

Almost surely, 2^9951669 is an apocalyptic number.

It is an amenable number.

9951669 is a deficient number, since it is larger than the sum of its proper divisors (8393931).

9951669 is a wasteful number, since it uses less digits than its factorization.

9951669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 471 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 9951669 is about 3154.6266023097. The cubic root of 9951669 is about 215.0958217188.

The spelling of 9951669 in words is "nine million, nine hundred fifty-one thousand, six hundred sixty-nine".