155454869 has 2 divisors, whose sum is σ = 155454870. Its totient is φ = 155454868.

The previous prime is 155454839. The next prime is 155454947. The reversal of 155454869 is 968454551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102718225 + 52736644 = 10135^2 + 7262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155454869 is a prime.

It is a super-2 number, since 2×155454869² = 48332432591614322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155454839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77727434 + 77727435.

It is an arithmetic number, because the mean of its divisors is an integer number (77727435).

Almost surely, 2^155454869 is an apocalyptic number.

It is an amenable number.

155454869 is a deficient number, since it is larger than the sum of its proper divisors (1).

155454869 is an equidigital number, since it uses as much as digits as its factorization.

155454869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 47.

The square root of 155454869 is about 12468.1541937851. The cubic root of 155454869 is about 537.6934875067.

The spelling of 155454869 in words is "one hundred fifty-five million, four hundred fifty-four thousand, eight hundred sixty-nine".