87433121 has 2 divisors, whose sum is σ = 87433122. Its totient is φ = 87433120.

The previous prime is 87433067. The next prime is 87433123. The reversal of 87433121 is 12133478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62980096 + 24453025 = 7936^2 + 4945^2 .

It is a cyclic number.

It is not a de Polignac number, because 87433121 - 2¹⁰ = 87432097 is a prime.

Together with 87433123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87433123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43716560 + 43716561.

It is an arithmetic number, because the mean of its divisors is an integer number (43716561).

Almost surely, 2^87433121 is an apocalyptic number.

It is an amenable number.

87433121 is a deficient number, since it is larger than the sum of its proper divisors (1).

87433121 is an equidigital number, since it uses as much as digits as its factorization.

87433121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 87433121 is about 9350.5679506648. The cubic root of 87433121 is about 443.8388632192.

Adding to 87433121 its reverse (12133478), we get a palindrome (99566599).

The spelling of 87433121 in words is "eighty-seven million, four hundred thirty-three thousand, one hundred twenty-one".