1145863777 has 4 divisors (see below), whose sum is σ = 1173811716. Its totient is φ = 1117915840.

The previous prime is 1145863727. The next prime is 1145863783. The reversal of 1145863777 is 7773685411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7773685411 = 2017 ⋅3854083.

It can be written as a sum of positive squares in 2 ways, for example, as 523311376 + 622552401 = 22876^2 + 24951^2 .

It is not a de Polignac number, because 1145863777 - 2²⁷ = 1011646049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145863777.

It is not an unprimeable number, because it can be changed into a prime (1145863717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13973908 + ... + 13973989.

It is an arithmetic number, because the mean of its divisors is an integer number (293452929).

Almost surely, 2^1145863777 is an apocalyptic number.

It is an amenable number.

1145863777 is a deficient number, since it is larger than the sum of its proper divisors (27947939).

1145863777 is an equidigital number, since it uses as much as digits as its factorization.

1145863777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27947938.

The product of its digits is 987840, while the sum is 49.

The square root of 1145863777 is about 33850.6096990881. The cubic root of 1145863777 is about 1046.4319637624.

The spelling of 1145863777 in words is "one billion, one hundred forty-five million, eight hundred sixty-three thousand, seven hundred seventy-seven".