402919 has 4 divisors (see below), whose sum is σ = 439560. Its totient is φ = 366280.

The previous prime is 402881. The next prime is 402923. The reversal of 402919 is 919204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402919 - 2¹¹ = 400871 is a prime.

It is a super-2 number, since 2×402919² = 324687441122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402893 and 402902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402949) 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 in 3 ways as a sum of consecutive naturals, for example, 18304 + ... + 18325.

It is an arithmetic number, because the mean of its divisors is an integer number (109890).

2⁴⁰²⁹¹⁹ is an apocalyptic number.

402919 is a deficient number, since it is larger than the sum of its proper divisors (36641).

402919 is a wasteful number, since it uses less digits than its factorization.

402919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36640.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 402919 is about 634.7590093886. The cubic root of 402919 is about 73.8594238917.

The spelling of 402919 in words is "four hundred two thousand, nine hundred nineteen".