1075781977 has 2 divisors, whose sum is σ = 1075781978. Its totient is φ = 1075781976.

The previous prime is 1075781911. The next prime is 1075782011. The reversal of 1075781977 is 7791875701.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1063803456 + 11978521 = 32616^2 + 3461^2 .

It is a cyclic number.

It is not a de Polignac number, because 1075781977 - 2⁷ = 1075781849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1075782977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537890988 + 537890989.

It is an arithmetic number, because the mean of its divisors is an integer number (537890989).

Almost surely, 2^1075781977 is an apocalyptic number.

It is an amenable number.

1075781977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1075781977 is an equidigital number, since it uses as much as digits as its factorization.

1075781977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864360, while the sum is 52.

The square root of 1075781977 is about 32799.1154911226. The cubic root of 1075781977 is about 1024.6481368503.

The spelling of 1075781977 in words is "one billion, seventy-five million, seven hundred eighty-one thousand, nine hundred seventy-seven".