87238943 has 6 divisors (see below), whose sum is σ = 95890872. Its totient is φ = 79308020.

The previous prime is 87238927. The next prime is 87238961. The reversal of 87238943 is 34983278.

It is not a de Polignac number, because 87238943 - 2⁴ = 87238927 is a prime.

It is a super-2 number, since 2×87238943² = 15221266351514498, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 87238894 and 87238903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87238973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360371 + ... + 360612.

It is an arithmetic number, because the mean of its divisors is an integer number (15981812).

Almost surely, 2^87238943 is an apocalyptic number.

87238943 is a deficient number, since it is larger than the sum of its proper divisors (8651929).

87238943 is a wasteful number, since it uses less digits than its factorization.

87238943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721005 (or 720994 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 87238943 is about 9340.1789597416. The cubic root of 87238943 is about 443.5100495243.

Adding to 87238943 its reverse (34983278), we get a palindrome (122222221).

The spelling of 87238943 in words is "eighty-seven million, two hundred thirty-eight thousand, nine hundred forty-three".