154561091 has 8 divisors (see below), whose sum is σ = 158000544. Its totient is φ = 151141120.

The previous prime is 154561037. The next prime is 154561117. The reversal of 154561091 is 190165451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154561091 is a prime.

It is a super-2 number, since 2×154561091² = 47778261702220562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154563091) 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 7 ways as a sum of consecutive naturals, for example, 11795 + ... + 21171.

It is an arithmetic number, because the mean of its divisors is an integer number (19750068).

Almost surely, 2^154561091 is an apocalyptic number.

154561091 is a deficient number, since it is larger than the sum of its proper divisors (3439453).

154561091 is an equidigital number, since it uses as much as digits as its factorization.

154561091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9741.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 154561091 is about 12432.2600921956. The cubic root of 154561091 is about 536.6610279789.

The spelling of 154561091 in words is "one hundred fifty-four million, five hundred sixty-one thousand, ninety-one".