87145843 has 2 divisors, whose sum is σ = 87145844. Its totient is φ = 87145842.

The previous prime is 87145823. The next prime is 87145847. The reversal of 87145843 is 34854178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87145843 - 2⁵ = 87145811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87145796 and 87145805.

It is not a weakly prime, because it can be changed into another prime (87145847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43572921 + 43572922.

It is an arithmetic number, because the mean of its divisors is an integer number (43572922).

Almost surely, 2^87145843 is an apocalyptic number.

87145843 is a deficient number, since it is larger than the sum of its proper divisors (1).

87145843 is an equidigital number, since it uses as much as digits as its factorization.

87145843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 87145843 is about 9335.1937848124. The cubic root of 87145843 is about 443.3522244323.

The spelling of 87145843 in words is "eighty-seven million, one hundred forty-five thousand, eight hundred forty-three".