264615623 has 2 divisors, whose sum is σ = 264615624. Its totient is φ = 264615622.

The previous prime is 264615619. The next prime is 264615643. The reversal of 264615623 is 326516462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264615623 - 2² = 264615619 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264615613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132307811 + 132307812.

It is an arithmetic number, because the mean of its divisors is an integer number (132307812).

Almost surely, 2^264615623 is an apocalyptic number.

264615623 is a deficient number, since it is larger than the sum of its proper divisors (1).

264615623 is an equidigital number, since it uses as much as digits as its factorization.

264615623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 35.

The square root of 264615623 is about 16267.0102661798. The cubic root of 264615623 is about 642.0051233242.

The spelling of 264615623 in words is "two hundred sixty-four million, six hundred fifteen thousand, six hundred twenty-three".