1670521573 has 6 divisors (see below), whose sum is σ = 1943259846. Its totient is φ = 1431875592.

The previous prime is 1670521571. The next prime is 1670521603. The reversal of 1670521573 is 3751250761.

It can be written as a sum of positive squares in only one way, i.e., 1514221569 + 156300004 = 38913^2 + 12502^2 .

It is not a de Polignac number, because 1670521573 - 2¹ = 1670521571 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 (1670521571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17046090 + ... + 17046187.

It is an arithmetic number, because the mean of its divisors is an integer number (323876641).

Almost surely, 2^1670521573 is an apocalyptic number.

It is an amenable number.

1670521573 is a deficient number, since it is larger than the sum of its proper divisors (272738273).

1670521573 is an equidigital number, since it uses as much as digits as its factorization.

1670521573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34092291 (or 34092284 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 1670521573 is about 40872.0145454075. The cubic root of 1670521573 is about 1186.5444970158.

The spelling of 1670521573 in words is "one billion, six hundred seventy million, five hundred twenty-one thousand, five hundred seventy-three".