254689621 has 2 divisors, whose sum is σ = 254689622. Its totient is φ = 254689620.

The previous prime is 254689577. The next prime is 254689637. The reversal of 254689621 is 126986452.

254689621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237591396 + 17098225 = 15414^2 + 4135^2 .

It is a cyclic number.

It is not a de Polignac number, because 254689621 - 2⁹ = 254689109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254689651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127344810 + 127344811.

It is an arithmetic number, because the mean of its divisors is an integer number (127344811).

Almost surely, 2^254689621 is an apocalyptic number.

It is an amenable number.

254689621 is a deficient number, since it is larger than the sum of its proper divisors (1).

254689621 is an equidigital number, since it uses as much as digits as its factorization.

254689621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 254689621 is about 15958.9981201829. The cubic root of 254689621 is about 633.8751831629.

The spelling of 254689621 in words is "two hundred fifty-four million, six hundred eighty-nine thousand, six hundred twenty-one".