2147891953 has 2 divisors, whose sum is σ = 2147891954. Its totient is φ = 2147891952.

The previous prime is 2147891951. The next prime is 2147891971. The reversal of 2147891953 is 3591987412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2107085409 + 40806544 = 45903^2 + 6388^2 .

It is a cyclic number.

It is not a de Polignac number, because 2147891953 - 2¹ = 2147891951 is a prime.

It is a super-2 number, since 2×2147891953² = 9226879683524308418, which contains 22 as substring.

Together with 2147891951, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2147891897 and 2147891906.

It is not a weakly prime, because it can be changed into another prime (2147891951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073945976 + 1073945977.

It is an arithmetic number, because the mean of its divisors is an integer number (1073945977).

Almost surely, 2^2147891953 is an apocalyptic number.

It is an amenable number.

2147891953 is a deficient number, since it is larger than the sum of its proper divisors (1).

2147891953 is an equidigital number, since it uses as much as digits as its factorization.

2147891953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 2147891953 is about 46345.3552473169. The cubic root of 2147891953 is about 1290.2409166853.

The spelling of 2147891953 in words is "two billion, one hundred forty-seven million, eight hundred ninety-one thousand, nine hundred fifty-three".