145231349 has 2 divisors, whose sum is σ = 145231350. Its totient is φ = 145231348.

The previous prime is 145231321. The next prime is 145231351. The reversal of 145231349 is 943132541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132664324 + 12567025 = 11518^2 + 3545^2 .

It is a cyclic number.

It is not a de Polignac number, because 145231349 - 2¹² = 145227253 is a prime.

Together with 145231351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145231319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72615674 + 72615675.

It is an arithmetic number, because the mean of its divisors is an integer number (72615675).

Almost surely, 2^145231349 is an apocalyptic number.

It is an amenable number.

145231349 is a deficient number, since it is larger than the sum of its proper divisors (1).

145231349 is an equidigital number, since it uses as much as digits as its factorization.

145231349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 145231349 is about 12051.1969944898. The cubic root of 145231349 is about 525.6380439095.

The spelling of 145231349 in words is "one hundred forty-five million, two hundred thirty-one thousand, three hundred forty-nine".