959968921 has 4 divisors (see below), whose sum is σ = 962042752. Its totient is φ = 957895092.

The previous prime is 959968879. The next prime is 959968951. The reversal of 959968921 is 129869959.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129869959 = 19 ⋅6835261.

It is a cyclic number.

It is not a de Polignac number, because 959968921 - 2¹⁷ = 959837849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (959968951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036221 + ... + 1037146.

It is an arithmetic number, because the mean of its divisors is an integer number (240510688).

Almost surely, 2^959968921 is an apocalyptic number.

It is an amenable number.

959968921 is a deficient number, since it is larger than the sum of its proper divisors (2073831).

959968921 is a wasteful number, since it uses less digits than its factorization.

959968921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073830.

The product of its digits is 3149280, while the sum is 58.

The square root of 959968921 is about 30983.3652303942. The cubic root of 959968921 is about 986.4741841444.

The spelling of 959968921 in words is "nine hundred fifty-nine million, nine hundred sixty-eight thousand, nine hundred twenty-one".