154740889 has 2 divisors, whose sum is σ = 154740890. Its totient is φ = 154740888.

The previous prime is 154740877. The next prime is 154740913. The reversal of 154740889 is 988047451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122478489 + 32262400 = 11067^2 + 5680^2 .

It is a cyclic number.

It is not a de Polignac number, because 154740889 - 2⁵ = 154740857 is a prime.

It is not a weakly prime, because it can be changed into another prime (154710889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77370444 + 77370445.

It is an arithmetic number, because the mean of its divisors is an integer number (77370445).

Almost surely, 2^154740889 is an apocalyptic number.

It is an amenable number.

154740889 is a deficient number, since it is larger than the sum of its proper divisors (1).

154740889 is an equidigital number, since it uses as much as digits as its factorization.

154740889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 154740889 is about 12439.4890972258. The cubic root of 154740889 is about 536.8690432214.

It can be divided in two parts, 1547 and 40889, that added together give a square (42436 = 206²).

The spelling of 154740889 in words is "one hundred fifty-four million, seven hundred forty thousand, eight hundred eighty-nine".