155630669 has 2 divisors, whose sum is σ = 155630670. Its totient is φ = 155630668.

The previous prime is 155630647. The next prime is 155630687. The reversal of 155630669 is 966036551.

155630669 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., 152522500 + 3108169 = 12350^2 + 1763^2 .

It is a cyclic number.

It is not a de Polignac number, because 155630669 - 2⁸ = 155630413 is a prime.

It is a super-2 number, since 2×155630669² = 48441810266775122, which contains 22 as substring.

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 (155630609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77815334 + 77815335.

It is an arithmetic number, because the mean of its divisors is an integer number (77815335).

Almost surely, 2^155630669 is an apocalyptic number.

It is an amenable number.

155630669 is a deficient number, since it is larger than the sum of its proper divisors (1).

155630669 is an equidigital number, since it uses as much as digits as its factorization.

155630669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 155630669 is about 12475.2021626906. The cubic root of 155630669 is about 537.8960991618.

The spelling of 155630669 in words is "one hundred fifty-five million, six hundred thirty thousand, six hundred sixty-nine".