154198497 has 4 divisors (see below), whose sum is σ = 205598000. Its totient is φ = 102798996.

The previous prime is 154198477. The next prime is 154198501. The reversal of 154198497 is 794891451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 794891451 = 3 ⋅264963817.

It is not a de Polignac number, because 154198497 - 2¹⁴ = 154182113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154198427) 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, 25699747 + ... + 25699752.

It is an arithmetic number, because the mean of its divisors is an integer number (51399500).

Almost surely, 2^154198497 is an apocalyptic number.

It is an amenable number.

154198497 is a deficient number, since it is larger than the sum of its proper divisors (51399503).

154198497 is an equidigital number, since it uses as much as digits as its factorization.

154198497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51399502.

The product of its digits is 362880, while the sum is 48.

The square root of 154198497 is about 12417.6687425619. The cubic root of 154198497 is about 536.2410377711.

The spelling of 154198497 in words is "one hundred fifty-four million, one hundred ninety-eight thousand, four hundred ninety-seven".