145117747 has 2 divisors, whose sum is σ = 145117748. Its totient is φ = 145117746.

The previous prime is 145117697. The next prime is 145117771. The reversal of 145117747 is 747711541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145117747 - 2⁷ = 145117619 is a prime.

It is not a weakly prime, because it can be changed into another prime (145117447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72558873 + 72558874.

It is an arithmetic number, because the mean of its divisors is an integer number (72558874).

Almost surely, 2^145117747 is an apocalyptic number.

145117747 is a deficient number, since it is larger than the sum of its proper divisors (1).

145117747 is an equidigital number, since it uses as much as digits as its factorization.

145117747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27440, while the sum is 37.

The square root of 145117747 is about 12046.4827646911. The cubic root of 145117747 is about 525.5009543398.

The spelling of 145117747 in words is "one hundred forty-five million, one hundred seventeen thousand, seven hundred forty-seven".