402319 has 4 divisors (see below), whose sum is σ = 406120. Its totient is φ = 398520.

The previous prime is 402313. The next prime is 402329. The reversal of 402319 is 913204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402319 is a prime.

It is a super-2 number, since 2×402319² = 323721155522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 402296 and 402305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1737 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (101530).

2⁴⁰²³¹⁹ is an apocalyptic number.

402319 is a deficient number, since it is larger than the sum of its proper divisors (3801).

402319 is a wasteful number, since it uses less digits than its factorization.

402319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 402319 is about 634.2862129985. The cubic root of 402319 is about 73.8227435086.

The spelling of 402319 in words is "four hundred two thousand, three hundred nineteen".