121478653 has 2 divisors, whose sum is σ = 121478654. Its totient is φ = 121478652.

The previous prime is 121478641. The next prime is 121478689. The reversal of 121478653 is 356874121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120934009 + 544644 = 10997^2 + 738^2 .

It is an emirp because it is prime and its reverse (356874121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121478653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121478603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60739326 + 60739327.

It is an arithmetic number, because the mean of its divisors is an integer number (60739327).

Almost surely, 2^121478653 is an apocalyptic number.

It is an amenable number.

121478653 is a deficient number, since it is larger than the sum of its proper divisors (1).

121478653 is an equidigital number, since it uses as much as digits as its factorization.

121478653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 121478653 is about 11021.7354804042. The cubic root of 121478653 is about 495.2600789517.

The spelling of 121478653 in words is "one hundred twenty-one million, four hundred seventy-eight thousand, six hundred fifty-three".