145761397 has 2 divisors, whose sum is σ = 145761398. Its totient is φ = 145761396.

The previous prime is 145761361. The next prime is 145761401. The reversal of 145761397 is 793167541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139972561 + 5788836 = 11831^2 + 2406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145761397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145768397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72880698 + 72880699.

It is an arithmetic number, because the mean of its divisors is an integer number (72880699).

Almost surely, 2^145761397 is an apocalyptic number.

It is an amenable number.

145761397 is a deficient number, since it is larger than the sum of its proper divisors (1).

145761397 is an equidigital number, since it uses as much as digits as its factorization.

145761397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 43.

The square root of 145761397 is about 12073.1684739343. The cubic root of 145761397 is about 526.2767378083.

The spelling of 145761397 in words is "one hundred forty-five million, seven hundred sixty-one thousand, three hundred ninety-seven".