145149397 has 2 divisors, whose sum is σ = 145149398. Its totient is φ = 145149396.

The previous prime is 145149377. The next prime is 145149401. The reversal of 145149397 is 793941541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140991876 + 4157521 = 11874^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 145149397 - 2¹⁹ = 144625109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145149337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72574698 + 72574699.

It is an arithmetic number, because the mean of its divisors is an integer number (72574699).

Almost surely, 2^145149397 is an apocalyptic number.

It is an amenable number.

145149397 is a deficient number, since it is larger than the sum of its proper divisors (1).

145149397 is an equidigital number, since it uses as much as digits as its factorization.

145149397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 145149397 is about 12047.7963545206. The cubic root of 145149397 is about 525.5391552642.

The spelling of 145149397 in words is "one hundred forty-five million, one hundred forty-nine thousand, three hundred ninety-seven".