1971230897 has 4 divisors (see below), whose sum is σ = 2017073520. Its totient is φ = 1925388276.

The previous prime is 1971230857. The next prime is 1971230909. The reversal of 1971230897 is 7980321791.

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.

It is a cyclic number.

It is not a de Polignac number, because 1971230897 - 2¹⁴ = 1971214513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1971230857) 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, 22921247 + ... + 22921332.

It is an arithmetic number, because the mean of its divisors is an integer number (504268380).

Almost surely, 2^1971230897 is an apocalyptic number.

It is an amenable number.

1971230897 is a deficient number, since it is larger than the sum of its proper divisors (45842623).

1971230897 is an equidigital number, since it uses as much as digits as its factorization.

1971230897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45842622.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 1971230897 is about 44398.5461135835. The cubic root of 1971230897 is about 1253.8507167633.

The spelling of 1971230897 in words is "one billion, nine hundred seventy-one million, two hundred thirty thousand, eight hundred ninety-seven".