87831477031 has 2 divisors, whose sum is σ = 87831477032. Its totient is φ = 87831477030.

The previous prime is 87831477029. The next prime is 87831477037. The reversal of 87831477031 is 13077413878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87831477031 - 2¹ = 87831477029 is a prime.

It is a super-2 number, since 2×87831477031² (a number of 23 digits) contains 22 as substring.

Together with 87831477029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87831477037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43915738515 + 43915738516.

It is an arithmetic number, because the mean of its divisors is an integer number (43915738516).

Almost surely, 2^87831477031 is an apocalyptic number.

87831477031 is a deficient number, since it is larger than the sum of its proper divisors (1).

87831477031 is an equidigital number, since it uses as much as digits as its factorization.

87831477031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 87831477031 in words is "eighty-seven billion, eight hundred thirty-one million, four hundred seventy-seven thousand, thirty-one".