964219561 has 4 divisors (see below), whose sum is σ = 964905300. Its totient is φ = 963533824.

The previous prime is 964219511. The next prime is 964219589. The reversal of 964219561 is 165912469.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 513294336 + 450925225 = 22656^2 + 21235^2 .

It is a cyclic number.

It is not a de Polignac number, because 964219561 - 2¹⁹ = 963695273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (964219511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340756 + ... + 343573.

It is an arithmetic number, because the mean of its divisors is an integer number (241226325).

Almost surely, 2^964219561 is an apocalyptic number.

It is an amenable number.

964219561 is a deficient number, since it is larger than the sum of its proper divisors (685739).

964219561 is a wasteful number, since it uses less digits than its factorization.

964219561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685738.

The product of its digits is 116640, while the sum is 43.

The square root of 964219561 is about 31051.8849830409. The cubic root of 964219561 is about 987.9280412359.

The spelling of 964219561 in words is "nine hundred sixty-four million, two hundred nineteen thousand, five hundred sixty-one".