87251623 has 2 divisors, whose sum is σ = 87251624. Its totient is φ = 87251622.

The previous prime is 87251617. The next prime is 87251657. The reversal of 87251623 is 32615278.

It is a happy number.

It is an a-pointer prime, because the next prime (87251657) can be obtained adding 87251623 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87251623 - 2²¹ = 85154471 is a prime.

It is a super-2 number, since 2×87251623² = 15225691432268258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87251603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43625811 + 43625812.

It is an arithmetic number, because the mean of its divisors is an integer number (43625812).

Almost surely, 2^87251623 is an apocalyptic number.

87251623 is a deficient number, since it is larger than the sum of its proper divisors (1).

87251623 is an equidigital number, since it uses as much as digits as its factorization.

87251623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 87251623 is about 9340.8577229289. The cubic root of 87251623 is about 443.5315362395.

The spelling of 87251623 in words is "eighty-seven million, two hundred fifty-one thousand, six hundred twenty-three".