68724031 has 2 divisors, whose sum is σ = 68724032. Its totient is φ = 68724030.

The previous prime is 68723989. The next prime is 68724101. The reversal of 68724031 is 13042786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68724031 - 2⁷ = 68723903 is a prime.

It is a super-2 number, since 2×68724031² = 9445984873777922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68723984 and 68724002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68724431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34362015 + 34362016.

It is an arithmetic number, because the mean of its divisors is an integer number (34362016).

Almost surely, 2^68724031 is an apocalyptic number.

68724031 is a deficient number, since it is larger than the sum of its proper divisors (1).

68724031 is an equidigital number, since it uses as much as digits as its factorization.

68724031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 68724031 is about 8289.9958383584. The cubic root of 68724031 is about 409.6090483097.

The spelling of 68724031 in words is "sixty-eight million, seven hundred twenty-four thousand, thirty-one".