678352631 has 4 divisors (see below), whose sum is σ = 740021064. Its totient is φ = 616684200.

The previous prime is 678352621. The next prime is 678352637. The reversal of 678352631 is 136253876.

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

It is not a de Polignac number, because 678352631 - 2¹⁴ = 678336247 is a prime.

It is a super-2 number, since 2×678352631² = 920324583969244322, 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 (678352637) 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, 30834200 + ... + 30834221.

It is an arithmetic number, because the mean of its divisors is an integer number (185005266).

Almost surely, 2^678352631 is an apocalyptic number.

678352631 is a deficient number, since it is larger than the sum of its proper divisors (61668433).

678352631 is a wasteful number, since it uses less digits than its factorization.

678352631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61668432.

The product of its digits is 181440, while the sum is 41.

The square root of 678352631 is about 26045.2036083422. The cubic root of 678352631 is about 878.6552424792.

The spelling of 678352631 in words is "six hundred seventy-eight million, three hundred fifty-two thousand, six hundred thirty-one".