154020199 has 4 divisors (see below), whose sum is σ = 154269640. Its totient is φ = 153770760.

The previous prime is 154020197. The next prime is 154020211. The reversal of 154020199 is 991020451.

154020199 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 is a cyclic number.

It is not a de Polignac number, because 154020199 - 2¹ = 154020197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154020199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154020193) 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, 123792 + ... + 125029.

It is an arithmetic number, because the mean of its divisors is an integer number (38567410).

Almost surely, 2^154020199 is an apocalyptic number.

154020199 is a deficient number, since it is larger than the sum of its proper divisors (249441).

154020199 is an equidigital number, since it uses as much as digits as its factorization.

154020199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249440.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 154020199 is about 12410.4874602088. The cubic root of 154020199 is about 536.0342748837.

The spelling of 154020199 in words is "one hundred fifty-four million, twenty thousand, one hundred ninety-nine".