402869 has 2 divisors, whose sum is σ = 402870. Its totient is φ = 402868.

The previous prime is 402863. The next prime is 402881. The reversal of 402869 is 968204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315844 + 87025 = 562^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 402869 - 2⁸ = 402613 is a prime.

It is a super-2 number, since 2×402869² = 324606862322, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402869.

It is not a weakly prime, because it can be changed into another prime (402863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201434 + 201435.

It is an arithmetic number, because the mean of its divisors is an integer number (201435).

2⁴⁰²⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

402869 is a deficient number, since it is larger than the sum of its proper divisors (1).

402869 is an equidigital number, since it uses as much as digits as its factorization.

402869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 402869 is about 634.7196231408. The cubic root of 402869 is about 73.8563685845.

The spelling of 402869 in words is "four hundred two thousand, eight hundred sixty-nine".