1275977089 has 2 divisors, whose sum is σ = 1275977090. Its totient is φ = 1275977088.

The previous prime is 1275977023. The next prime is 1275977093. The reversal of 1275977089 is 9807795721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246654864 + 29322225 = 35308^2 + 5415^2 .

It is an emirp because it is prime and its reverse (9807795721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1275977089 - 2⁹ = 1275976577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1275977189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637988544 + 637988545.

It is an arithmetic number, because the mean of its divisors is an integer number (637988545).

Almost surely, 2^1275977089 is an apocalyptic number.

It is an amenable number.

1275977089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275977089 is an equidigital number, since it uses as much as digits as its factorization.

1275977089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2222640, while the sum is 55.

The square root of 1275977089 is about 35720.8215051110. The cubic root of 1275977089 is about 1084.6283674179.

The spelling of 1275977089 in words is "one billion, two hundred seventy-five million, nine hundred seventy-seven thousand, eighty-nine".