154534973 has 2 divisors, whose sum is σ = 154534974. Its totient is φ = 154534972.

The previous prime is 154534957. The next prime is 154534993. The reversal of 154534973 is 379435451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117896164 + 36638809 = 10858^2 + 6053^2 .

It is an emirp because it is prime and its reverse (379435451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154534973 - 2⁴ = 154534957 is a prime.

It is a super-2 number, since 2×154534973² = 47762115760221458, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 154534973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154534993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77267486 + 77267487.

It is an arithmetic number, because the mean of its divisors is an integer number (77267487).

Almost surely, 2^154534973 is an apocalyptic number.

It is an amenable number.

154534973 is a deficient number, since it is larger than the sum of its proper divisors (1).

154534973 is an equidigital number, since it uses as much as digits as its factorization.

154534973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 41.

The square root of 154534973 is about 12431.2096354297. The cubic root of 154534973 is about 536.6307976404.

The spelling of 154534973 in words is "one hundred fifty-four million, five hundred thirty-four thousand, nine hundred seventy-three".