154479869 has 2 divisors, whose sum is σ = 154479870. Its totient is φ = 154479868.

The previous prime is 154479863. The next prime is 154479887. The reversal of 154479869 is 968974451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85340644 + 69139225 = 9238^2 + 8315^2 .

It is a cyclic number.

It is not a de Polignac number, because 154479869 - 2²⁰ = 153431293 is a prime.

It is a super-2 number, since 2×154479869² = 47728059852514322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 154479869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154479863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77239934 + 77239935.

It is an arithmetic number, because the mean of its divisors is an integer number (77239935).

Almost surely, 2^154479869 is an apocalyptic number.

It is an amenable number.

154479869 is a deficient number, since it is larger than the sum of its proper divisors (1).

154479869 is an equidigital number, since it uses as much as digits as its factorization.

154479869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 154479869 is about 12428.9930806964. The cubic root of 154479869 is about 536.5670062143.

The spelling of 154479869 in words is "one hundred fifty-four million, four hundred seventy-nine thousand, eight hundred sixty-nine".