1897963413 has 4 divisors (see below), whose sum is σ = 2530617888. Its totient is φ = 1265308940.

The previous prime is 1897963411. The next prime is 1897963421. The reversal of 1897963413 is 3143697981.

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: 3143697981 = 3 ⋅1047899327.

It is a cyclic number.

It is not a de Polignac number, because 1897963413 - 2¹ = 1897963411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897963411) 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, 316327233 + ... + 316327238.

It is an arithmetic number, because the mean of its divisors is an integer number (632654472).

Almost surely, 2^1897963413 is an apocalyptic number.

It is an amenable number.

1897963413 is a deficient number, since it is larger than the sum of its proper divisors (632654475).

1897963413 is an equidigital number, since it uses as much as digits as its factorization.

1897963413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632654474.

The product of its digits is 979776, while the sum is 51.

The square root of 1897963413 is about 43565.6219168280. The cubic root of 1897963413 is about 1238.1196380979.

The spelling of 1897963413 in words is "one billion, eight hundred ninety-seven million, nine hundred sixty-three thousand, four hundred thirteen".