1672520849 has 4 divisors (see below), whose sum is σ = 1700868720. Its totient is φ = 1644172980.

The previous prime is 1672520827. The next prime is 1672520867. The reversal of 1672520849 is 9480252761.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 9480252761 = 7 ⋅1354321823.

It is a cyclic number.

It is not a de Polignac number, because 1672520849 - 2¹² = 1672516753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1672520869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14173847 + ... + 14173964.

It is an arithmetic number, because the mean of its divisors is an integer number (425217180).

Almost surely, 2^1672520849 is an apocalyptic number.

It is an amenable number.

1672520849 is a deficient number, since it is larger than the sum of its proper divisors (28347871).

1672520849 is an equidigital number, since it uses as much as digits as its factorization.

1672520849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28347870.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1672520849 is about 40896.4649939332. The cubic root of 1672520849 is about 1187.0176594587.

The spelling of 1672520849 in words is "one billion, six hundred seventy-two million, five hundred twenty thousand, eight hundred forty-nine".