121640383 has 2 divisors, whose sum is σ = 121640384. Its totient is φ = 121640382.

The previous prime is 121640377. The next prime is 121640437. The reversal of 121640383 is 383046121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121640383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121610383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60820191 + 60820192.

It is an arithmetic number, because the mean of its divisors is an integer number (60820192).

Almost surely, 2^121640383 is an apocalyptic number.

121640383 is a deficient number, since it is larger than the sum of its proper divisors (1).

121640383 is an equidigital number, since it uses as much as digits as its factorization.

121640383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 121640383 is about 11029.0699063883. The cubic root of 121640383 is about 495.4797688332.

The spelling of 121640383 in words is "one hundred twenty-one million, six hundred forty thousand, three hundred eighty-three".