145885897 has 2 divisors, whose sum is σ = 145885898. Its totient is φ = 145885896.

The previous prime is 145885889. The next prime is 145885919. The reversal of 145885897 is 798588541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86657481 + 59228416 = 9309^2 + 7696^2 .

It is a cyclic number.

It is not a de Polignac number, because 145885897 - 2³ = 145885889 is a prime.

It is not a weakly prime, because it can be changed into another prime (145885807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72942948 + 72942949.

It is an arithmetic number, because the mean of its divisors is an integer number (72942949).

Almost surely, 2^145885897 is an apocalyptic number.

It is an amenable number.

145885897 is a deficient number, since it is larger than the sum of its proper divisors (1).

145885897 is an equidigital number, since it uses as much as digits as its factorization.

145885897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3225600, while the sum is 55.

The square root of 145885897 is about 12078.3234349805. The cubic root of 145885897 is about 526.4265324026.

The spelling of 145885897 in words is "one hundred forty-five million, eight hundred eighty-five thousand, eight hundred ninety-seven".