154115869 has 2 divisors, whose sum is σ = 154115870. Its totient is φ = 154115868.

The previous prime is 154115861. The next prime is 154115873. The reversal of 154115869 is 968511451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149768644 + 4347225 = 12238^2 + 2085^2 .

It is a cyclic number.

It is not a de Polignac number, because 154115869 - 2³ = 154115861 is a prime.

It is a super-2 number, since 2×154115869² = 47503402155250322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154115861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77057934 + 77057935.

It is an arithmetic number, because the mean of its divisors is an integer number (77057935).

Almost surely, 2^154115869 is an apocalyptic number.

It is an amenable number.

154115869 is a deficient number, since it is larger than the sum of its proper divisors (1).

154115869 is an equidigital number, since it uses as much as digits as its factorization.

154115869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 40.

The square root of 154115869 is about 12414.3412632326. The cubic root of 154115869 is about 536.1452382184.

The spelling of 154115869 in words is "one hundred fifty-four million, one hundred fifteen thousand, eight hundred sixty-nine".