169128451 has 2 divisors, whose sum is σ = 169128452. Its totient is φ = 169128450.

The previous prime is 169128437. The next prime is 169128457. The reversal of 169128451 is 154821961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 169128451 - 2²⁷ = 34910723 is a prime.

It is equal to p_9457039 and since 169128451 and 9457039 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 169128451.

It is not a weakly prime, because it can be changed into another prime (169128457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84564225 + 84564226.

It is an arithmetic number, because the mean of its divisors is an integer number (84564226).

Almost surely, 2^169128451 is an apocalyptic number.

169128451 is a deficient number, since it is larger than the sum of its proper divisors (1).

169128451 is an equidigital number, since it uses as much as digits as its factorization.

169128451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 169128451 is about 13004.9394846727. The cubic root of 169128451 is about 553.0175201850.

The spelling of 169128451 in words is "one hundred sixty-nine million, one hundred twenty-eight thousand, four hundred fifty-one".