154981469 has 4 divisors (see below), whose sum is σ = 164098044. Its totient is φ = 145864896.

The previous prime is 154981447. The next prime is 154981483. The reversal of 154981469 is 964189451.

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 114811225 + 40170244 = 10715^2 + 6338^2 .

It is not a de Polignac number, because 154981469 - 2¹² = 154977373 is a prime.

It is a super-2 number, since 2×154981469² = 48038511466795922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154981769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4558262 + ... + 4558295.

It is an arithmetic number, because the mean of its divisors is an integer number (41024511).

Almost surely, 2^154981469 is an apocalyptic number.

It is an amenable number.

154981469 is a deficient number, since it is larger than the sum of its proper divisors (9116575).

154981469 is an equidigital number, since it uses as much as digits as its factorization.

154981469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9116574.

The product of its digits is 311040, while the sum is 47.

The square root of 154981469 is about 12449.1553528743. The cubic root of 154981469 is about 537.1471276088.

The spelling of 154981469 in words is "one hundred fifty-four million, nine hundred eighty-one thousand, four hundred sixty-nine".