4000624609 has 2 divisors, whose sum is σ = 4000624610. Its totient is φ = 4000624608.

The previous prime is 4000624601. The next prime is 4000624613. The reversal of 4000624609 is 9064260004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3501325584 + 499299025 = 59172^2 + 22345^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000624609 - 2³ = 4000624601 is a prime.

It is not a weakly prime, because it can be changed into another prime (4000624601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000312304 + 2000312305.

It is an arithmetic number, because the mean of its divisors is an integer number (2000312305).

Almost surely, 2^4000624609 is an apocalyptic number.

It is an amenable number.

4000624609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000624609 is an equidigital number, since it uses as much as digits as its factorization.

4000624609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 4000624609 is about 63250.4909783315. The cubic root of 4000624609 is about 1587.4836730832.

The spelling of 4000624609 in words is "four billion, six hundred twenty-four thousand, six hundred nine".