67400400031 has 2 divisors, whose sum is σ = 67400400032. Its totient is φ = 67400400030.

The previous prime is 67400400017. The next prime is 67400400047. The reversal of 67400400031 is 13000400476.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67400400031 - 2¹¹ = 67400397983 is a prime.

It is a super-2 number, since 2×67400400031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67400399969 and 67400400005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67400400091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33700200015 + 33700200016.

It is an arithmetic number, because the mean of its divisors is an integer number (33700200016).

Almost surely, 2^67400400031 is an apocalyptic number.

67400400031 is a deficient number, since it is larger than the sum of its proper divisors (1).

67400400031 is an equidigital number, since it uses as much as digits as its factorization.

67400400031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The spelling of 67400400031 in words is "sixty-seven billion, four hundred million, four hundred thousand, thirty-one".