154742397 has 4 divisors (see below), whose sum is σ = 206323200. Its totient is φ = 103161596.

The previous prime is 154742389. The next prime is 154742443. The reversal of 154742397 is 793247451.

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.

It is a cyclic number.

It is not a de Polignac number, because 154742397 - 2³ = 154742389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154742317) 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, 25790397 + ... + 25790402.

It is an arithmetic number, because the mean of its divisors is an integer number (51580800).

Almost surely, 2^154742397 is an apocalyptic number.

It is an amenable number.

154742397 is a deficient number, since it is larger than the sum of its proper divisors (51580803).

154742397 is an equidigital number, since it uses as much as digits as its factorization.

154742397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51580802.

The product of its digits is 211680, while the sum is 42.

The square root of 154742397 is about 12439.5497105000. The cubic root of 154742397 is about 536.8707872032.

It can be divided in two parts, 15474 and 2397, that added together give a palindrome (17871).

The spelling of 154742397 in words is "one hundred fifty-four million, seven hundred forty-two thousand, three hundred ninety-seven".