1964525623 has 2 divisors, whose sum is σ = 1964525624. Its totient is φ = 1964525622.

The previous prime is 1964525621. The next prime is 1964525659. The reversal of 1964525623 is 3265254691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1964525623 - 2¹ = 1964525621 is a prime.

Together with 1964525621, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1964525623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964525621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982262811 + 982262812.

It is an arithmetic number, because the mean of its divisors is an integer number (982262812).

Almost surely, 2^1964525623 is an apocalyptic number.

1964525623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964525623 is an equidigital number, since it uses as much as digits as its factorization.

1964525623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 43.

The square root of 1964525623 is about 44322.9694740774. The cubic root of 1964525623 is about 1252.4274159767.

The spelling of 1964525623 in words is "one billion, nine hundred sixty-four million, five hundred twenty-five thousand, six hundred twenty-three".