402871973 has 24 divisors (see below), whose sum is σ = 486631800. Its totient is φ = 332158848.

The previous prime is 402871961. The next prime is 402871981. The reversal of 402871973 is 379178204.

It can be written as a sum of positive squares in 4 ways, for example, as 42745444 + 360126529 = 6538^2 + 18977^2 .

It is not a de Polignac number, because 402871973 - 2⁸ = 402871717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402871973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402871913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 723011 + ... + 723567.

It is an arithmetic number, because the mean of its divisors is an integer number (20276325).

Almost surely, 2^402871973 is an apocalyptic number.

It is an amenable number.

402871973 is a deficient number, since it is larger than the sum of its proper divisors (83759827).

402871973 is a wasteful number, since it uses less digits than its factorization.

402871973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 402871973 is about 20071.6709070271. The cubic root of 402871973 is about 738.5655026017.

The spelling of 402871973 in words is "four hundred two million, eight hundred seventy-one thousand, nine hundred seventy-three".