153982421 has 2 divisors, whose sum is σ = 153982422. Its totient is φ = 153982420.

The previous prime is 153982399. The next prime is 153982453. The reversal of 153982421 is 124289351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152794321 + 1188100 = 12361^2 + 1090^2 .

It is an emirp because it is prime and its reverse (124289351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 153982421 - 2⁶ = 153982357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153982121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76991210 + 76991211.

It is an arithmetic number, because the mean of its divisors is an integer number (76991211).

Almost surely, 2^153982421 is an apocalyptic number.

It is an amenable number.

153982421 is a deficient number, since it is larger than the sum of its proper divisors (1).

153982421 is an equidigital number, since it uses as much as digits as its factorization.

153982421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 153982421 is about 12408.9653476831. The cubic root of 153982421 is about 535.9904452240.

The spelling of 153982421 in words is "one hundred fifty-three million, nine hundred eighty-two thousand, four hundred twenty-one".