145502197 has 2 divisors, whose sum is σ = 145502198. Its totient is φ = 145502196.

The previous prime is 145502191. The next prime is 145502207. The reversal of 145502197 is 791205541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115756081 + 29746116 = 10759^2 + 5454^2 .

It is a cyclic number.

It is not a de Polignac number, because 145502197 - 2⁷ = 145502069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145502191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72751098 + 72751099.

It is an arithmetic number, because the mean of its divisors is an integer number (72751099).

Almost surely, 2^145502197 is an apocalyptic number.

It is an amenable number.

145502197 is a deficient number, since it is larger than the sum of its proper divisors (1).

145502197 is an equidigital number, since it uses as much as digits as its factorization.

145502197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 145502197 is about 12062.4291500510. The cubic root of 145502197 is about 525.9646024265.

The spelling of 145502197 in words is "one hundred forty-five million, five hundred two thousand, one hundred ninety-seven".