121959693 has 6 divisors (see below), whose sum is σ = 176164014. Its totient is φ = 81306456.

The previous prime is 121959671. The next prime is 121959701. The reversal of 121959693 is 396959121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74597769 + 47361924 = 8637^2 + 6882^2 .

It is not a de Polignac number, because 121959693 - 2⁵ = 121959661 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121959623) 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, 6775530 + ... + 6775547.

It is an arithmetic number, because the mean of its divisors is an integer number (29360669).

Almost surely, 2^121959693 is an apocalyptic number.

It is an amenable number.

121959693 is a deficient number, since it is larger than the sum of its proper divisors (54204321).

121959693 is a wasteful number, since it uses less digits than its factorization.

121959693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13551083 (or 13551080 counting only the distinct ones).

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

The square root of 121959693 is about 11043.5362542983. The cubic root of 121959693 is about 495.9129402458.

The spelling of 121959693 in words is "one hundred twenty-one million, nine hundred fifty-nine thousand, six hundred ninety-three".