145353661 has 2 divisors, whose sum is σ = 145353662. Its totient is φ = 145353660.

The previous prime is 145353647. The next prime is 145353671. The reversal of 145353661 is 166353541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137030436 + 8323225 = 11706^2 + 2885^2 .

It is a cyclic number.

It is not a de Polignac number, because 145353661 - 2¹³ = 145345469 is a prime.

It is a super-2 number, since 2×145353661² = 42255373532205842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145353671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72676830 + 72676831.

It is an arithmetic number, because the mean of its divisors is an integer number (72676831).

Almost surely, 2^145353661 is an apocalyptic number.

It is an amenable number.

145353661 is a deficient number, since it is larger than the sum of its proper divisors (1).

145353661 is an equidigital number, since it uses as much as digits as its factorization.

145353661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 34.

The square root of 145353661 is about 12056.2706091063. The cubic root of 145353661 is about 525.7855644018.

The spelling of 145353661 in words is "one hundred forty-five million, three hundred fifty-three thousand, six hundred sixty-one".