154216789 has 2 divisors, whose sum is σ = 154216790. Its totient is φ = 154216788.

The previous prime is 154216691. The next prime is 154216793. The reversal of 154216789 is 987612451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110880900 + 43335889 = 10530^2 + 6583^2 .

It is a cyclic number.

It is not a de Polignac number, because 154216789 - 2⁹ = 154216277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154216589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77108394 + 77108395.

It is an arithmetic number, because the mean of its divisors is an integer number (77108395).

Almost surely, 2^154216789 is an apocalyptic number.

It is an amenable number.

154216789 is a deficient number, since it is larger than the sum of its proper divisors (1).

154216789 is an equidigital number, since it uses as much as digits as its factorization.

154216789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 154216789 is about 12418.4052518832. The cubic root of 154216789 is about 536.2622410327.

The spelling of 154216789 in words is "one hundred fifty-four million, two hundred sixteen thousand, seven hundred eighty-nine".