121995767 has 2 divisors, whose sum is σ = 121995768. Its totient is φ = 121995766.

The previous prime is 121995763. The next prime is 121995781. The reversal of 121995767 is 767599121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121995767 - 2² = 121995763 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121995763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60997883 + 60997884.

It is an arithmetic number, because the mean of its divisors is an integer number (60997884).

Almost surely, 2^121995767 is an apocalyptic number.

121995767 is a deficient number, since it is larger than the sum of its proper divisors (1).

121995767 is an equidigital number, since it uses as much as digits as its factorization.

121995767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 47.

The square root of 121995767 is about 11045.1693966186. The cubic root of 121995767 is about 495.9618301684.

The spelling of 121995767 in words is "one hundred twenty-one million, nine hundred ninety-five thousand, seven hundred sixty-seven".