154061993 has 4 divisors (see below), whose sum is σ = 154322388. Its totient is φ = 153801600.

The previous prime is 154061987. The next prime is 154062023. The reversal of 154061993 is 399160451.

154061993 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 2 ways, for example, as 114661264 + 39400729 = 10708^2 + 6277^2 .

It is a cyclic number.

It is not a de Polignac number, because 154061993 - 2⁸ = 154061737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (154061953) 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, 129308 + ... + 130493.

It is an arithmetic number, because the mean of its divisors is an integer number (38580597).

Almost surely, 2^154061993 is an apocalyptic number.

It is an amenable number.

154061993 is a deficient number, since it is larger than the sum of its proper divisors (260395).

154061993 is an equidigital number, since it uses as much as digits as its factorization.

154061993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260394.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 154061993 is about 12412.1711638214. The cubic root of 154061993 is about 536.0827555171.

The spelling of 154061993 in words is "one hundred fifty-four million, sixty-one thousand, nine hundred ninety-three".