1246989077 has 2 divisors, whose sum is σ = 1246989078. Its totient is φ = 1246989076.

The previous prime is 1246989071. The next prime is 1246989097. The reversal of 1246989077 is 7709896421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1021058116 + 225930961 = 31954^2 + 15031^2 .

It is an emirp because it is prime and its reverse (7709896421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1246989077 - 2¹⁰ = 1246988053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1246989071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623494538 + 623494539.

It is an arithmetic number, because the mean of its divisors is an integer number (623494539).

Almost surely, 2^1246989077 is an apocalyptic number.

It is an amenable number.

1246989077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246989077 is an equidigital number, since it uses as much as digits as its factorization.

1246989077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 1246989077 is about 35312.7325054293. The cubic root of 1246989077 is about 1076.3517380419.

The spelling of 1246989077 in words is "one billion, two hundred forty-six million, nine hundred eighty-nine thousand, seventy-seven".