402719 has 4 divisors (see below), whose sum is σ = 404544. Its totient is φ = 400896.

The previous prime is 402697. The next prime is 402739. The reversal of 402719 is 917204.

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-402719 is a prime.

It is a super-2 number, since 2×402719² = 324365185922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402694 and 402703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402739) 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, 527 + ... + 1040.

It is an arithmetic number, because the mean of its divisors is an integer number (101136).

2⁴⁰²⁷¹⁹ is an apocalyptic number.

402719 is a deficient number, since it is larger than the sum of its proper divisors (1825).

402719 is a wasteful number, since it uses less digits than its factorization.

402719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 402719 is about 634.6014497305. The cubic root of 402719 is about 73.8472011459.

The spelling of 402719 in words is "four hundred two thousand, seven hundred nineteen".