145137897 has 12 divisors (see below), whose sum is σ = 209760564. Its totient is φ = 96704640.

The previous prime is 145137893. The next prime is 145137919. The reversal of 145137897 is 798731541.

It can be written as a sum of positive squares in 2 ways, for example, as 123010281 + 22127616 = 11091^2 + 4704^2 .

It is not a de Polignac number, because 145137897 - 2² = 145137893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145137893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18997 + ... + 25517.

It is an arithmetic number, because the mean of its divisors is an integer number (17480047).

Almost surely, 2^145137897 is an apocalyptic number.

It is an amenable number.

145137897 is a deficient number, since it is larger than the sum of its proper divisors (64622667).

145137897 is a wasteful number, since it uses less digits than its factorization.

145137897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000 (or 8997 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 145137897 is about 12047.3190793637. The cubic root of 145137897 is about 525.5252756339.

The spelling of 145137897 in words is "one hundred forty-five million, one hundred thirty-seven thousand, eight hundred ninety-seven".