9951951 has 8 divisors (see below), whose sum is σ = 13288240. Its totient is φ = 6625152.

The previous prime is 9951917. The next prime is 9951973. The reversal of 9951951 is 1591599.

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

It is not a de Polignac number, because 9951951 - 2¹⁴ = 9935567 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 (9951911) 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, 615 + ... + 4503.

It is an arithmetic number, because the mean of its divisors is an integer number (1661030).

Almost surely, 2^9951951 is an apocalyptic number.

9951951 is a deficient number, since it is larger than the sum of its proper divisors (3336289).

9951951 is a wasteful number, since it uses less digits than its factorization.

9951951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745.

The product of its digits is 18225, while the sum is 39.

The square root of 9951951 is about 3154.6712982496. The cubic root of 9951951 is about 215.0978534199.

The spelling of 9951951 in words is "nine million, nine hundred fifty-one thousand, nine hundred fifty-one".