87402311 has 2 divisors, whose sum is σ = 87402312. Its totient is φ = 87402310.

The previous prime is 87402307. The next prime is 87402313. The reversal of 87402311 is 11320478.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87402311 - 2² = 87402307 is a prime.

Together with 87402313, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_5075162 and since 87402311 and 5075162 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87402313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43701155 + 43701156.

It is an arithmetic number, because the mean of its divisors is an integer number (43701156).

Almost surely, 2^87402311 is an apocalyptic number.

87402311 is a deficient number, since it is larger than the sum of its proper divisors (1).

87402311 is an equidigital number, since it uses as much as digits as its factorization.

87402311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 87402311 is about 9348.9203119933. The cubic root of 87402311 is about 443.7867232453.

Adding to 87402311 its reverse (11320478), we get a palindrome (98722789).

The spelling of 87402311 in words is "eighty-seven million, four hundred two thousand, three hundred eleven".