524961991 has 4 divisors (see below), whose sum is σ = 537765984. Its totient is φ = 512158000.

The previous prime is 524961971. The next prime is 524962003. The reversal of 524961991 is 199169425.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 524961991 - 2⁷ = 524961863 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 (524961911) 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, 6401935 + ... + 6402016.

It is an arithmetic number, because the mean of its divisors is an integer number (134441496).

Almost surely, 2^524961991 is an apocalyptic number.

524961991 is a deficient number, since it is larger than the sum of its proper divisors (12803993).

524961991 is a wasteful number, since it uses less digits than its factorization.

524961991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12803992.

The product of its digits is 174960, while the sum is 46.

The square root of 524961991 is about 22912.0490353875. The cubic root of 524961991 is about 806.6948543490.

The spelling of 524961991 in words is "five hundred twenty-four million, nine hundred sixty-one thousand, nine hundred ninety-one".