145369897 has 2 divisors, whose sum is σ = 145369898. Its totient is φ = 145369896.

The previous prime is 145369883. The next prime is 145369933. The reversal of 145369897 is 798963541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111915241 + 33454656 = 10579^2 + 5784^2 .

It is an emirp because it is prime and its reverse (798963541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145369897 is a prime.

It is a super-2 number, since 2×145369897² = 42264813907581218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145361897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72684948 + 72684949.

It is an arithmetic number, because the mean of its divisors is an integer number (72684949).

Almost surely, 2^145369897 is an apocalyptic number.

It is an amenable number.

145369897 is a deficient number, since it is larger than the sum of its proper divisors (1).

145369897 is an equidigital number, since it uses as much as digits as its factorization.

145369897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 145369897 is about 12056.9439328546. The cubic root of 145369897 is about 525.8051404174.

The spelling of 145369897 in words is "one hundred forty-five million, three hundred sixty-nine thousand, eight hundred ninety-seven".