145623497 has 2 divisors, whose sum is σ = 145623498. Its totient is φ = 145623496.

The previous prime is 145623493. The next prime is 145623521. The reversal of 145623497 is 794326541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93624976 + 51998521 = 9676^2 + 7211^2 .

It is an emirp because it is prime and its reverse (794326541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145623497 - 2² = 145623493 is a prime.

It is not a weakly prime, because it can be changed into another prime (145623493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72811748 + 72811749.

It is an arithmetic number, because the mean of its divisors is an integer number (72811749).

Almost surely, 2^145623497 is an apocalyptic number.

It is an amenable number.

145623497 is a deficient number, since it is larger than the sum of its proper divisors (1).

145623497 is an equidigital number, since it uses as much as digits as its factorization.

145623497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 145623497 is about 12067.4561113766. The cubic root of 145623497 is about 526.1107211488.

The spelling of 145623497 in words is "one hundred forty-five million, six hundred twenty-three thousand, four hundred ninety-seven".