154450691 has 4 divisors (see below), whose sum is σ = 158625072. Its totient is φ = 150276312.

The previous prime is 154450679. The next prime is 154450693. The reversal of 154450691 is 196054451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196054451 = 89 ⋅2202859.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154450691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154450693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2087135 + ... + 2087208.

It is an arithmetic number, because the mean of its divisors is an integer number (39656268).

Almost surely, 2^154450691 is an apocalyptic number.

154450691 is a deficient number, since it is larger than the sum of its proper divisors (4174381).

154450691 is an equidigital number, since it uses as much as digits as its factorization.

154450691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4174380.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 154450691 is about 12427.8192375010. The cubic root of 154450691 is about 536.5332220110.

The spelling of 154450691 in words is "one hundred fifty-four million, four hundred fifty thousand, six hundred ninety-one".