154383421 has 2 divisors, whose sum is σ = 154383422. Its totient is φ = 154383420.

The previous prime is 154383419. The next prime is 154383431. The reversal of 154383421 is 124383451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139476100 + 14907321 = 11810^2 + 3861^2 .

It is a cyclic number.

It is not a de Polignac number, because 154383421 - 2¹ = 154383419 is a prime.

Together with 154383419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154383431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77191710 + 77191711.

It is an arithmetic number, because the mean of its divisors is an integer number (77191711).

Almost surely, 2^154383421 is an apocalyptic number.

It is an amenable number.

154383421 is a deficient number, since it is larger than the sum of its proper divisors (1).

154383421 is an equidigital number, since it uses as much as digits as its factorization.

154383421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 154383421 is about 12425.1125145811. The cubic root of 154383421 is about 536.4553161740.

The spelling of 154383421 in words is "one hundred fifty-four million, three hundred eighty-three thousand, four hundred twenty-one".