77173000031 has 2 divisors, whose sum is σ = 77173000032. Its totient is φ = 77173000030.

The previous prime is 77173000027. The next prime is 77173000087. The reversal of 77173000031 is 13000037177.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77173000031 - 2² = 77173000027 is a prime.

It is a super-2 number, since 2×77173000031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77172999958 and 77173000003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77173000831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38586500015 + 38586500016.

It is an arithmetic number, because the mean of its divisors is an integer number (38586500016).

Almost surely, 2^77173000031 is an apocalyptic number.

77173000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

77173000031 is an equidigital number, since it uses as much as digits as its factorization.

77173000031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3087, while the sum is 29.

The spelling of 77173000031 in words is "seventy-seven billion, one hundred seventy-three million, thirty-one", and thus it is an aban number.