145105777 has 2 divisors, whose sum is σ = 145105778. Its totient is φ = 145105776.

The previous prime is 145105769. The next prime is 145105787. The reversal of 145105777 is 777501541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78127921 + 66977856 = 8839^2 + 8184^2 .

It is an emirp because it is prime and its reverse (777501541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145105777 - 2³ = 145105769 is a prime.

It is not a weakly prime, because it can be changed into another prime (145105757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72552888 + 72552889.

It is an arithmetic number, because the mean of its divisors is an integer number (72552889).

Almost surely, 2^145105777 is an apocalyptic number.

It is an amenable number.

145105777 is a deficient number, since it is larger than the sum of its proper divisors (1).

145105777 is an equidigital number, since it uses as much as digits as its factorization.

145105777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34300, while the sum is 37.

The square root of 145105777 is about 12045.9859289308. The cubic root of 145105777 is about 525.4865053389.

The spelling of 145105777 in words is "one hundred forty-five million, one hundred five thousand, seven hundred seventy-seven".