1652123897 has 4 divisors (see below), whose sum is σ = 1683296100. Its totient is φ = 1620951696.

The previous prime is 1652123887. The next prime is 1652123909. The reversal of 1652123897 is 7983212561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1053391936 + 598731961 = 32456^2 + 24469^2 .

It is a cyclic number.

It is not a de Polignac number, because 1652123897 - 2²⁴ = 1635346681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1652123867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15586022 + ... + 15586127.

It is an arithmetic number, because the mean of its divisors is an integer number (420824025).

Almost surely, 2^1652123897 is an apocalyptic number.

It is an amenable number.

1652123897 is a deficient number, since it is larger than the sum of its proper divisors (31172203).

1652123897 is an equidigital number, since it uses as much as digits as its factorization.

1652123897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31172202.

The product of its digits is 181440, while the sum is 44.

The square root of 1652123897 is about 40646.3269804296. The cubic root of 1652123897 is about 1182.1725505198.

The spelling of 1652123897 in words is "one billion, six hundred fifty-two million, one hundred twenty-three thousand, eight hundred ninety-seven".