1610028397 has 4 divisors (see below), whose sum is σ = 1653542716. Its totient is φ = 1566514080.

The previous prime is 1610028391. The next prime is 1610028419. The reversal of 1610028397 is 7938200161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7938200161 = 17011 ⋅466651.

It can be written as a sum of positive squares in 2 ways, for example, as 1399807396 + 210221001 = 37414^2 + 14499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1610028397 - 2⁷ = 1610028269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 43514281 = 1610028397 / (1 + 6 + 1 + 0 + 0 + 2 + 8 + 3 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610028391) 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, 21757104 + ... + 21757177.

It is an arithmetic number, because the mean of its divisors is an integer number (413385679).

Almost surely, 2^1610028397 is an apocalyptic number.

It is an amenable number.

1610028397 is a deficient number, since it is larger than the sum of its proper divisors (43514319).

1610028397 is an equidigital number, since it uses as much as digits as its factorization.

1610028397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43514318.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1610028397 is about 40125.1591523323. The cubic root of 1610028397 is about 1172.0456085894.

The spelling of 1610028397 in words is "one billion, six hundred ten million, twenty-eight thousand, three hundred ninety-seven".