87340031 has 2 divisors, whose sum is σ = 87340032. Its totient is φ = 87340030.

The previous prime is 87340013. The next prime is 87340063. The reversal of 87340031 is 13004378.

Together with previous prime (87340013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87340031 is a prime.

It is a super-2 number, since 2×87340031² = 15256562030161922, which contains 22 as substring.

It is a plaindrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87340081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43670015 + 43670016.

It is an arithmetic number, because the mean of its divisors is an integer number (43670016).

Almost surely, 2^87340031 is an apocalyptic number.

87340031 is a deficient number, since it is larger than the sum of its proper divisors (1).

87340031 is an equidigital number, since it uses as much as digits as its factorization.

87340031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 87340031 is about 9345.5888525015. The cubic root of 87340031 is about 443.6812889446.

It can be divided in two parts, 873 and 40031, that added together give a palindrome (40904).

The spelling of 87340031 in words is "eighty-seven million, three hundred forty thousand, thirty-one".