121639703 has 2 divisors, whose sum is σ = 121639704. Its totient is φ = 121639702.

The previous prime is 121639669. The next prime is 121639723. The reversal of 121639703 is 307936121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121639703 - 2⁸ = 121639447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121639703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121639723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60819851 + 60819852.

It is an arithmetic number, because the mean of its divisors is an integer number (60819852).

Almost surely, 2^121639703 is an apocalyptic number.

121639703 is a deficient number, since it is larger than the sum of its proper divisors (1).

121639703 is an equidigital number, since it uses as much as digits as its factorization.

121639703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 121639703 is about 11029.0390787230. The cubic root of 121639703 is about 495.4788455464.

The spelling of 121639703 in words is "one hundred twenty-one million, six hundred thirty-nine thousand, seven hundred three".