154428499 has 4 divisors (see below), whose sum is σ = 155871864. Its totient is φ = 152985136.

The previous prime is 154428487. The next prime is 154428529. The reversal of 154428499 is 994824451.

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 154428499 - 2¹⁷ = 154297427 is a prime.

It is a super-2 number, since 2×154428499² = 47696322606786002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154428199) 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, 721522 + ... + 721735.

It is an arithmetic number, because the mean of its divisors is an integer number (38967966).

Almost surely, 2^154428499 is an apocalyptic number.

154428499 is a deficient number, since it is larger than the sum of its proper divisors (1443365).

154428499 is a wasteful number, since it uses less digits than its factorization.

154428499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443364.

The product of its digits is 414720, while the sum is 46.

The square root of 154428499 is about 12426.9263697827. The cubic root of 154428499 is about 536.5075238082.

The spelling of 154428499 in words is "one hundred fifty-four million, four hundred twenty-eight thousand, four hundred ninety-nine".