145644497 has 2 divisors, whose sum is σ = 145644498. Its totient is φ = 145644496.

The previous prime is 145644461. The next prime is 145644503. The reversal of 145644497 is 794446541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110586256 + 35058241 = 10516^2 + 5921^2 .

It is a cyclic number.

It is not a de Polignac number, because 145644497 - 2⁸ = 145644241 is a prime.

It is not a weakly prime, because it can be changed into another prime (145644407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72822248 + 72822249.

It is an arithmetic number, because the mean of its divisors is an integer number (72822249).

Almost surely, 2^145644497 is an apocalyptic number.

It is an amenable number.

145644497 is a deficient number, since it is larger than the sum of its proper divisors (1).

145644497 is an equidigital number, since it uses as much as digits as its factorization.

145644497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 44.

The square root of 145644497 is about 12068.3261888300. The cubic root of 145644497 is about 526.1360096366.

It can be divided in two parts, 1456444 and 97, that added together give a palindrome (1456541).

The spelling of 145644497 in words is "one hundred forty-five million, six hundred forty-four thousand, four hundred ninety-seven".