154420081 has 2 divisors, whose sum is σ = 154420082. Its totient is φ = 154420080.

The previous prime is 154420043. The next prime is 154420093. The reversal of 154420081 is 180024451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128051856 + 26368225 = 11316^2 + 5135^2 .

It is an emirp because it is prime and its reverse (180024451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154420081 - 2⁹ = 154419569 is a prime.

It is a super-2 number, since 2×154420081² = 47691122832093122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154420001) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77210040 + 77210041.

It is an arithmetic number, because the mean of its divisors is an integer number (77210041).

Almost surely, 2^154420081 is an apocalyptic number.

It is an amenable number.

154420081 is a deficient number, since it is larger than the sum of its proper divisors (1).

154420081 is an equidigital number, since it uses as much as digits as its factorization.

154420081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 154420081 is about 12426.5876651638. The cubic root of 154420081 is about 536.4977751706.

The spelling of 154420081 in words is "one hundred fifty-four million, four hundred twenty thousand, eighty-one".