120691969 has 2 divisors, whose sum is σ = 120691970. Its totient is φ = 120691968.

The previous prime is 120691919. The next prime is 120691973. The reversal of 120691969 is 969196021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106853569 + 13838400 = 10337^2 + 3720^2 .

It is a cyclic number.

It is not a de Polignac number, because 120691969 - 2¹⁷ = 120560897 is a prime.

It is a super-2 number, since 2×120691969² = 29133102762193922, which contains 22 as substring.

It is equal to p_6878806 and since 120691969 and 6878806 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (120691919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60345984 + 60345985.

It is an arithmetic number, because the mean of its divisors is an integer number (60345985).

Almost surely, 2^120691969 is an apocalyptic number.

It is an amenable number.

120691969 is a deficient number, since it is larger than the sum of its proper divisors (1).

120691969 is an equidigital number, since it uses as much as digits as its factorization.

120691969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 120691969 is about 10985.9896686644. The cubic root of 120691969 is about 494.1886774019.

The spelling of 120691969 in words is "one hundred twenty million, six hundred ninety-one thousand, nine hundred sixty-nine".