145599397 has 2 divisors, whose sum is σ = 145599398. Its totient is φ = 145599396.

The previous prime is 145599371. The next prime is 145599409. The reversal of 145599397 is 793995541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86601636 + 58997761 = 9306^2 + 7681^2 .

It is a cyclic number.

It is not a de Polignac number, because 145599397 - 2¹¹ = 145597349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145599317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72799698 + 72799699.

It is an arithmetic number, because the mean of its divisors is an integer number (72799699).

Almost surely, 2^145599397 is an apocalyptic number.

It is an amenable number.

145599397 is a deficient number, since it is larger than the sum of its proper divisors (1).

145599397 is an equidigital number, since it uses as much as digits as its factorization.

145599397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1530900, while the sum is 52.

The square root of 145599397 is about 12066.4575166036. The cubic root of 145599397 is about 526.0816966022.

The spelling of 145599397 in words is "one hundred forty-five million, five hundred ninety-nine thousand, three hundred ninety-seven".