145705811 has 2 divisors, whose sum is σ = 145705812. Its totient is φ = 145705810.

The previous prime is 145705787. The next prime is 145705823. The reversal of 145705811 is 118507541.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145705811 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (145705871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72852905 + 72852906.

It is an arithmetic number, because the mean of its divisors is an integer number (72852906).

Almost surely, 2^145705811 is an apocalyptic number.

145705811 is a deficient number, since it is larger than the sum of its proper divisors (1).

145705811 is an equidigital number, since it uses as much as digits as its factorization.

145705811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 32.

The square root of 145705811 is about 12070.8662075263. The cubic root of 145705811 is about 526.2098308888.

The spelling of 145705811 in words is "one hundred forty-five million, seven hundred five thousand, eight hundred eleven".