87494389 has 2 divisors, whose sum is σ = 87494390. Its totient is φ = 87494388.

The previous prime is 87494377. The next prime is 87494417. The reversal of 87494389 is 98349478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79959364 + 7535025 = 8942^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 87494389 - 2¹³ = 87486197 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87494089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43747194 + 43747195.

It is an arithmetic number, because the mean of its divisors is an integer number (43747195).

Almost surely, 2^87494389 is an apocalyptic number.

It is an amenable number.

87494389 is a deficient number, since it is larger than the sum of its proper divisors (1).

87494389 is an equidigital number, since it uses as much as digits as its factorization.

87494389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The square root of 87494389 is about 9353.8435415609. The cubic root of 87494389 is about 443.9425110887.

The spelling of 87494389 in words is "eighty-seven million, four hundred ninety-four thousand, three hundred eighty-nine".