154889506 has 4 divisors (see below), whose sum is σ = 232334262. Its totient is φ = 77444752.

The previous prime is 154889489. The next prime is 154889509. The reversal of 154889506 is 605988451.

154889506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 139358025 + 15531481 = 11805^2 + 3941^2 .

It is not an unprimeable number, because it can be changed into a prime (154889509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38722375 + ... + 38722378.

Almost surely, 2^154889506 is an apocalyptic number.

154889506 is a deficient number, since it is larger than the sum of its proper divisors (77444756).

154889506 is an equidigital number, since it uses as much as digits as its factorization.

154889506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77444755.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 154889506 is about 12445.4612610381. The cubic root of 154889506 is about 537.0408623557.

The spelling of 154889506 in words is "one hundred fifty-four million, eight hundred eighty-nine thousand, five hundred six".