145477289 has 2 divisors, whose sum is σ = 145477290. Its totient is φ = 145477288.

The previous prime is 145477249. The next prime is 145477349. The reversal of 145477289 is 982774541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 69438889 = 8720^2 + 8333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145477289 is a prime.

It is a super-2 number, since 2×145477289² = 42327283229579042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145477249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72738644 + 72738645.

It is an arithmetic number, because the mean of its divisors is an integer number (72738645).

Almost surely, 2^145477289 is an apocalyptic number.

It is an amenable number.

145477289 is a deficient number, since it is larger than the sum of its proper divisors (1).

145477289 is an equidigital number, since it uses as much as digits as its factorization.

145477289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The square root of 145477289 is about 12061.3966438386. The cubic root of 145477289 is about 525.9345880482.

The spelling of 145477289 in words is "one hundred forty-five million, four hundred seventy-seven thousand, two hundred eighty-nine".