145419797 has 2 divisors, whose sum is σ = 145419798. Its totient is φ = 145419796.

The previous prime is 145419793. The next prime is 145419817. The reversal of 145419797 is 797914541.

It is a happy number.

145419797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142301041 + 3118756 = 11929^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 145419797 - 2² = 145419793 is a prime.

It is a super-2 number, since 2×145419797² = 42293834719042418, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145419793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72709898 + 72709899.

It is an arithmetic number, because the mean of its divisors is an integer number (72709899).

Almost surely, 2^145419797 is an apocalyptic number.

It is an amenable number.

145419797 is a deficient number, since it is larger than the sum of its proper divisors (1).

145419797 is an equidigital number, since it uses as much as digits as its factorization.

145419797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The square root of 145419797 is about 12059.0131022402. The cubic root of 145419797 is about 525.8652965558.

The spelling of 145419797 in words is "one hundred forty-five million, four hundred nineteen thousand, seven hundred ninety-seven".