121653902 has 4 divisors (see below), whose sum is σ = 182480856. Its totient is φ = 60826950.

The previous prime is 121653899. The next prime is 121653913. The reversal of 121653902 is 209356121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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, 30413474 + ... + 30413477.

It is an arithmetic number, because the mean of its divisors is an integer number (45620214).

Almost surely, 2^121653902 is an apocalyptic number.

121653902 is a deficient number, since it is larger than the sum of its proper divisors (60826954).

121653902 is an equidigital number, since it uses as much as digits as its factorization.

121653902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60826953.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 121653902 is about 11029.6827696902. The cubic root of 121653902 is about 495.4981238747.

The spelling of 121653902 in words is "one hundred twenty-one million, six hundred fifty-three thousand, nine hundred two".