8121623 has 2 divisors, whose sum is σ = 8121624. Its totient is φ = 8121622.

The previous prime is 8121613. The next prime is 8121629. The reversal of 8121623 is 3261218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8121623 - 2⁶ = 8121559 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8121629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060811 + 4060812.

It is an arithmetic number, because the mean of its divisors is an integer number (4060812).

Almost surely, 2^8121623 is an apocalyptic number.

8121623 is a deficient number, since it is larger than the sum of its proper divisors (1).

8121623 is an equidigital number, since it uses as much as digits as its factorization.

8121623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 8121623 is about 2849.8461361975. The cubic root of 8121623 is about 201.0084317808.

It can be divided in two parts, 812 and 1623, that multiplied together give a triangular number (1317876 = T₁₆₂₃).

The spelling of 8121623 in words is "eight million, one hundred twenty-one thousand, six hundred twenty-three".