154285661 has 2 divisors, whose sum is σ = 154285662. Its totient is φ = 154285660.

The previous prime is 154285639. The next prime is 154285673. The reversal of 154285661 is 166582451.

It is a happy number.

154285661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153636025 + 649636 = 12395^2 + 806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154285661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154285361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77142830 + 77142831.

It is an arithmetic number, because the mean of its divisors is an integer number (77142831).

Almost surely, 2^154285661 is an apocalyptic number.

It is an amenable number.

154285661 is a deficient number, since it is larger than the sum of its proper divisors (1).

154285661 is an equidigital number, since it uses as much as digits as its factorization.

154285661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

The square root of 154285661 is about 12421.1779232084. The cubic root of 154285661 is about 536.3420593124.

The spelling of 154285661 in words is "one hundred fifty-four million, two hundred eighty-five thousand, six hundred sixty-one".