402397071 has 4 divisors (see below), whose sum is σ = 536529432. Its totient is φ = 268264712.

The previous prime is 402397063. The next prime is 402397091. The reversal of 402397071 is 170793204.

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 402397071 - 2³ = 402397063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402397091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67066176 + ... + 67066181.

It is an arithmetic number, because the mean of its divisors is an integer number (134132358).

Almost surely, 2^402397071 is an apocalyptic number.

402397071 is a deficient number, since it is larger than the sum of its proper divisors (134132361).

402397071 is a wasteful number, since it uses less digits than its factorization.

402397071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134132360.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 402397071 is about 20059.8372625503. The cubic root of 402397071 is about 738.2751836195.

The spelling of 402397071 in words is "four hundred two million, three hundred ninety-seven thousand, seventy-one".