145617547 has 2 divisors, whose sum is σ = 145617548. Its totient is φ = 145617546.

The previous prime is 145617541. The next prime is 145617559. The reversal of 145617547 is 745716541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145617547 - 2⁷ = 145617419 is a prime.

It is not a weakly prime, because it can be changed into another prime (145617541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72808773 + 72808774.

It is an arithmetic number, because the mean of its divisors is an integer number (72808774).

Almost surely, 2^145617547 is an apocalyptic number.

145617547 is a deficient number, since it is larger than the sum of its proper divisors (1).

145617547 is an equidigital number, since it uses as much as digits as its factorization.

145617547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 40.

The square root of 145617547 is about 12067.2095780259. The cubic root of 145617547 is about 526.1035556352.

The spelling of 145617547 in words is "one hundred forty-five million, six hundred seventeen thousand, five hundred forty-seven".