402147443 has 4 divisors (see below), whose sum is σ = 402348840. Its totient is φ = 401946048.

The previous prime is 402147439. The next prime is 402147491. The reversal of 402147443 is 344741204.

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 402147443 - 2² = 402147439 is a prime.

It is a super-2 number, since 2×402147443² = 323445131822876498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402147743) 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, 97673 + ... + 101706.

It is an arithmetic number, because the mean of its divisors is an integer number (100587210).

Almost surely, 2^402147443 is an apocalyptic number.

402147443 is a deficient number, since it is larger than the sum of its proper divisors (201397).

402147443 is a wasteful number, since it uses less digits than its factorization.

402147443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201396.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 402147443 is about 20053.6142129044. The cubic root of 402147443 is about 738.1224884393.

Adding to 402147443 its reverse (344741204), we get a palindrome (746888647).

The spelling of 402147443 in words is "four hundred two million, one hundred forty-seven thousand, four hundred forty-three".