681237258 has 16 divisors (see below), whose sum is σ = 1467280416. Its totient is φ = 209611440.

The previous prime is 681237257. The next prime is 681237259. The reversal of 681237258 is 852732186.

It is an interprime number because it is at equal distance from previous prime (681237257) and next prime (681237259).

It is not an unprimeable number, because it can be changed into a prime (681237251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4366828 + ... + 4366983.

It is an arithmetic number, because the mean of its divisors is an integer number (91705026).

Almost surely, 2^681237258 is an apocalyptic number.

681237258 is an abundant number, since it is smaller than the sum of its proper divisors (786043158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681237258 is a wasteful number, since it uses less digits than its factorization.

681237258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733829.

The product of its digits is 161280, while the sum is 42.

The square root of 681237258 is about 26100.5221786845. The cubic root of 681237258 is about 879.8989458684.

The spelling of 681237258 in words is "six hundred eighty-one million, two hundred thirty-seven thousand, two hundred fifty-eight".