402969 has 16 divisors (see below), whose sum is σ = 634880. Its totient is φ = 222480.

The previous prime is 402949. The next prime is 402991. The reversal of 402969 is 969204.

It is not a de Polignac number, because 402969 - 2¹⁷ = 271897 is a prime.

It is a super-2 number, since 2×402969² = 324768029922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (402949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342 + ... + 960.

It is an arithmetic number, because the mean of its divisors is an integer number (39680).

2⁴⁰²⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

402969 is a deficient number, since it is larger than the sum of its proper divisors (231911).

402969 is a wasteful number, since it uses less digits than its factorization.

402969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 402969 is about 634.7983931927. The cubic root of 402969 is about 73.8624789462.

The spelling of 402969 in words is "four hundred two thousand, nine hundred sixty-nine".