1958897 has 2 divisors, whose sum is σ = 1958898. Its totient is φ = 1958896.

The previous prime is 1958867. The next prime is 1958899. The reversal of 1958897 is 7988591.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1597696 + 361201 = 1264^2 + 601^2 .

It is a cyclic number.

It is not a de Polignac number, because 1958897 - 2⁶ = 1958833 is a prime.

Together with 1958899, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1958899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979448 + 979449.

It is an arithmetic number, because the mean of its divisors is an integer number (979449).

2^1958897 is an apocalyptic number.

It is an amenable number.

1958897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1958897 is an equidigital number, since it uses as much as digits as its factorization.

1958897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 47.

The square root of 1958897 is about 1399.6060159916. The cubic root of 1958897 is about 125.1230148990.

The spelling of 1958897 in words is "one million, nine hundred fifty-eight thousand, eight hundred ninety-seven".