154671947 has 2 divisors, whose sum is σ = 154671948. Its totient is φ = 154671946.

The previous prime is 154671929. The next prime is 154671953. The reversal of 154671947 is 749176451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154671947 - 2⁶ = 154671883 is a prime.

It is a super-2 number, since 2×154671947² = 47846822377541618, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 154671898 and 154671907.

It is not a weakly prime, because it can be changed into another prime (154671977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77335973 + 77335974.

It is an arithmetic number, because the mean of its divisors is an integer number (77335974).

Almost surely, 2^154671947 is an apocalyptic number.

154671947 is a deficient number, since it is larger than the sum of its proper divisors (1).

154671947 is an equidigital number, since it uses as much as digits as its factorization.

154671947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 154671947 is about 12436.7176939898. The cubic root of 154671947 is about 536.7893006186.

The spelling of 154671947 in words is "one hundred fifty-four million, six hundred seventy-one thousand, nine hundred forty-seven".