7623405809 has 2 divisors, whose sum is σ = 7623405810. Its totient is φ = 7623405808.

The previous prime is 7623405731. The next prime is 7623405857. The reversal of 7623405809 is 9085043267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6810870784 + 812535025 = 82528^2 + 28505^2 .

It is a cyclic number.

It is not a de Polignac number, because 7623405809 - 2¹⁶ = 7623340273 is a prime.

It is a super-2 number, since 2×7623405809² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7623405809.

It is not a weakly prime, because it can be changed into another prime (7623405899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3811702904 + 3811702905.

It is an arithmetic number, because the mean of its divisors is an integer number (3811702905).

Almost surely, 2^7623405809 is an apocalyptic number.

It is an amenable number.

7623405809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7623405809 is an equidigital number, since it uses as much as digits as its factorization.

7623405809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 7623405809 is about 87312.1171945796. The cubic root of 7623405809 is about 1968.1114119712. Note that the first 3 decimals are identical.

The spelling of 7623405809 in words is "seven billion, six hundred twenty-three million, four hundred five thousand, eight hundred nine".