87461131 has 2 divisors, whose sum is σ = 87461132. Its totient is φ = 87461130.

The previous prime is 87461119. The next prime is 87461149. The reversal of 87461131 is 13116478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87461131 - 2¹⁷ = 87330059 is a prime.

It is a super-2 number, since 2×87461131² = 15298898871598322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_5078335 and since 87461131 and 5078335 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 87461093 and 87461102.

It is not a weakly prime, because it can be changed into another prime (84461131) 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, 43730565 + 43730566.

It is an arithmetic number, because the mean of its divisors is an integer number (43730566).

Almost surely, 2^87461131 is an apocalyptic number.

87461131 is a deficient number, since it is larger than the sum of its proper divisors (1).

87461131 is an equidigital number, since it uses as much as digits as its factorization.

87461131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 87461131 is about 9352.0656007109. The cubic root of 87461131 is about 443.8862541053.

The spelling of 87461131 in words is "eighty-seven million, four hundred sixty-one thousand, one hundred thirty-one".