154074989 has 2 divisors, whose sum is σ = 154074990. Its totient is φ = 154074988.

The previous prime is 154074923. The next prime is 154075013. The reversal of 154074989 is 989470451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82537225 + 71537764 = 9085^2 + 8458^2 .

It is an emirp because it is prime and its reverse (989470451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154074989 - 2¹² = 154070893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154074589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77037494 + 77037495.

It is an arithmetic number, because the mean of its divisors is an integer number (77037495).

Almost surely, 2^154074989 is an apocalyptic number.

It is an amenable number.

154074989 is a deficient number, since it is larger than the sum of its proper divisors (1).

154074989 is an equidigital number, since it uses as much as digits as its factorization.

154074989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 154074989 is about 12412.6946711824. The cubic root of 154074989 is about 536.0978289635.

The spelling of 154074989 in words is "one hundred fifty-four million, seventy-four thousand, nine hundred eighty-nine".