145803897 has 6 divisors (see below), whose sum is σ = 210605642. Its totient is φ = 97202592.

The previous prime is 145803869. The next prime is 145803907. The reversal of 145803897 is 798308541.

It can be written as a sum of positive squares in only one way, i.e., 118461456 + 27342441 = 10884^2 + 5229^2 .

It is not a de Polignac number, because 145803897 - 2⁷ = 145803769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145803857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8100208 + ... + 8100225.

Almost surely, 2^145803897 is an apocalyptic number.

It is an amenable number.

145803897 is a deficient number, since it is larger than the sum of its proper divisors (64801745).

145803897 is a wasteful number, since it uses less digits than its factorization.

145803897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16200439 (or 16200436 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 145803897 is about 12074.9284469930. The cubic root of 145803897 is about 526.3278820946.

The spelling of 145803897 in words is "one hundred forty-five million, eight hundred three thousand, eight hundred ninety-seven".