963540509 has 4 divisors (see below), whose sum is σ = 963609504. Its totient is φ = 963471516.

The previous prime is 963540499. The next prime is 963540533. The reversal of 963540509 is 905045369.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 905045369 = 29 ⋅31208461.

It is a cyclic number.

It is not a de Polignac number, because 963540509 - 2⁴ = 963540493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (963540209) 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, 5327 + ... + 44220.

It is an arithmetic number, because the mean of its divisors is an integer number (240902376).

Almost surely, 2^963540509 is an apocalyptic number.

It is an amenable number.

963540509 is a deficient number, since it is larger than the sum of its proper divisors (68995).

963540509 is a wasteful number, since it uses less digits than its factorization.

963540509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68994.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 963540509 is about 31040.9489062432. The cubic root of 963540509 is about 987.6960705368.

The spelling of 963540509 in words is "nine hundred sixty-three million, five hundred forty thousand, five hundred nine".