1385298973 has 8 divisors (see below), whose sum is σ = 1401616440. Its totient is φ = 1368998400.

The previous prime is 1385298923. The next prime is 1385298977. The reversal of 1385298973 is 3798925831.

It can be written as a sum of positive squares in 4 ways, for example, as 322669369 + 1062629604 = 17963^2 + 32598^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385298973 - 2⁹ = 1385298461 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 (1385298977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246511 + ... + 252067.

It is an arithmetic number, because the mean of its divisors is an integer number (175202055).

Almost surely, 2^1385298973 is an apocalyptic number.

It is an amenable number.

1385298973 is a deficient number, since it is larger than the sum of its proper divisors (16317467).

1385298973 is an equidigital number, since it uses as much as digits as its factorization.

1385298973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8447.

The product of its digits is 3265920, while the sum is 55.

The square root of 1385298973 is about 37219.6046862403. The cubic root of 1385298973 is about 1114.7594708631.

The spelling of 1385298973 in words is "one billion, three hundred eighty-five million, two hundred ninety-eight thousand, nine hundred seventy-three".