531520973 has 2 divisors, whose sum is σ = 531520974. Its totient is φ = 531520972.

The previous prime is 531520949. The next prime is 531521059. The reversal of 531520973 is 379025135.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390339049 + 141181924 = 19757^2 + 11882^2 .

It is a cyclic number.

It is not a de Polignac number, because 531520973 - 2²⁸ = 263085517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531520673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265760486 + 265760487.

It is an arithmetic number, because the mean of its divisors is an integer number (265760487).

Almost surely, 2^531520973 is an apocalyptic number.

It is an amenable number.

531520973 is a deficient number, since it is larger than the sum of its proper divisors (1).

531520973 is an equidigital number, since it uses as much as digits as its factorization.

531520973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 531520973 is about 23054.7386235455. The cubic root of 531520973 is about 810.0406284554.

The spelling of 531520973 in words is "five hundred thirty-one million, five hundred twenty thousand, nine hundred seventy-three".