145019657 has 2 divisors, whose sum is σ = 145019658. Its totient is φ = 145019656.

The previous prime is 145019653. The next prime is 145019663. The reversal of 145019657 is 756910541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120209296 + 24810361 = 10964^2 + 4981^2 .

It is an emirp because it is prime and its reverse (756910541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145019657 - 2² = 145019653 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145019657.

It is not a weakly prime, because it can be changed into another prime (145019653) 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, 72509828 + 72509829.

It is an arithmetic number, because the mean of its divisors is an integer number (72509829).

Almost surely, 2^145019657 is an apocalyptic number.

It is an amenable number.

145019657 is a deficient number, since it is larger than the sum of its proper divisors (1).

145019657 is an equidigital number, since it uses as much as digits as its factorization.

145019657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 145019657 is about 12042.4107636303. The cubic root of 145019657 is about 525.3825263552.

The spelling of 145019657 in words is "one hundred forty-five million, nineteen thousand, six hundred fifty-seven".