154001389 has 4 divisors (see below), whose sum is σ = 154046620. Its totient is φ = 153956160.

The previous prime is 154001369. The next prime is 154001429. The reversal of 154001389 is 983100451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88924900 + 65076489 = 9430^2 + 8067^2 .

It is a cyclic number.

It is not a de Polignac number, because 154001389 - 2⁵ = 154001357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154001389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154001359) 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 in 3 ways as a sum of consecutive naturals, for example, 17052 + ... + 24469.

It is an arithmetic number, because the mean of its divisors is an integer number (38511655).

Almost surely, 2^154001389 is an apocalyptic number.

It is an amenable number.

154001389 is a deficient number, since it is larger than the sum of its proper divisors (45231).

154001389 is an equidigital number, since it uses as much as digits as its factorization.

154001389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45230.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 154001389 is about 12409.7296102695. The cubic root of 154001389 is about 536.0124526048.

The spelling of 154001389 in words is "one hundred fifty-four million, one thousand, three hundred eighty-nine".