9951399 has 6 divisors (see below), whose sum is σ = 14374256. Its totient is φ = 6634260.

The previous prime is 9951377. The next prime is 9951401. The reversal of 9951399 is 9931599.

It is not a de Polignac number, because 9951399 - 2⁵ = 9951367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9951329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 552847 + ... + 552864.

Almost surely, 2^9951399 is an apocalyptic number.

9951399 is a deficient number, since it is larger than the sum of its proper divisors (4422857).

9951399 is a wasteful number, since it uses less digits than its factorization.

9951399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105717 (or 1105714 counting only the distinct ones).

The product of its digits is 98415, while the sum is 45.

The square root of 9951399 is about 3154.5838077312. The cubic root of 9951399 is about 215.0938764372.

The spelling of 9951399 in words is "nine million, nine hundred fifty-one thousand, three hundred ninety-nine".