671023623 has 4 divisors (see below), whose sum is σ = 894698168. Its totient is φ = 447349080.

The previous prime is 671023583. The next prime is 671023631. The reversal of 671023623 is 326320176.

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

It is not a de Polignac number, because 671023623 - 2¹³ = 671015431 is a prime.

It is a super-2 number, since 2×671023623² = 900545405248092258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671023673) 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, 111837268 + ... + 111837273.

It is an arithmetic number, because the mean of its divisors is an integer number (223674542).

Almost surely, 2^671023623 is an apocalyptic number.

671023623 is a deficient number, since it is larger than the sum of its proper divisors (223674545).

671023623 is a wasteful number, since it uses less digits than its factorization.

671023623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223674544.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 671023623 is about 25904.1236678642. The cubic root of 671023623 is about 875.4794098834.

Adding to 671023623 its reverse (326320176), we get a palindrome (997343799).

The spelling of 671023623 in words is "six hundred seventy-one million, twenty-three thousand, six hundred twenty-three".