681242007 has 4 divisors (see below), whose sum is σ = 908322680. Its totient is φ = 454161336.

The previous prime is 681241993. The next prime is 681242021. The reversal of 681242007 is 700242186.

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

It is an interprime number because it is at equal distance from previous prime (681241993) and next prime (681242021).

It is not a de Polignac number, because 681242007 - 2¹² = 681237911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681242027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113540332 + ... + 113540337.

It is an arithmetic number, because the mean of its divisors is an integer number (227080670).

Almost surely, 2^681242007 is an apocalyptic number.

681242007 is a deficient number, since it is larger than the sum of its proper divisors (227080673).

681242007 is a wasteful number, since it uses less digits than its factorization.

681242007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227080672.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 681242007 is about 26100.6131537173. The cubic root of 681242007 is about 879.9009904965.

The spelling of 681242007 in words is "six hundred eighty-one million, two hundred forty-two thousand, seven".