87402331 has 2 divisors, whose sum is σ = 87402332. Its totient is φ = 87402330.

The previous prime is 87402313. The next prime is 87402379. The reversal of 87402331 is 13320478.

Together with previous prime (87402313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87402331 - 2⁹ = 87401819 is a prime.

It is a super-2 number, since 2×87402331² = 15278334928467122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_5075164 and since 87402331 and 5075164 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87402331.

It is not a weakly prime, because it can be changed into another prime (87402311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43701165 + 43701166.

It is an arithmetic number, because the mean of its divisors is an integer number (43701166).

Almost surely, 2^87402331 is an apocalyptic number.

87402331 is a deficient number, since it is larger than the sum of its proper divisors (1).

87402331 is an equidigital number, since it uses as much as digits as its factorization.

87402331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 87402331 is about 9348.9213816354. The cubic root of 87402331 is about 443.7867570954.

The spelling of 87402331 in words is "eighty-seven million, four hundred two thousand, three hundred thirty-one".