1397757077 has 2 divisors, whose sum is σ = 1397757078. Its totient is φ = 1397757076.

The previous prime is 1397757043. The next prime is 1397757089. The reversal of 1397757077 is 7707577931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1369444036 + 28313041 = 37006^2 + 5321^2 .

It is an emirp because it is prime and its reverse (7707577931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1397757077 - 2¹⁶ = 1397691541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397757007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698878538 + 698878539.

It is an arithmetic number, because the mean of its divisors is an integer number (698878539).

Almost surely, 2^1397757077 is an apocalyptic number.

It is an amenable number.

1397757077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397757077 is an equidigital number, since it uses as much as digits as its factorization.

1397757077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268945, while the sum is 53.

The square root of 1397757077 is about 37386.5895342167. The cubic root of 1397757077 is about 1118.0912101046.

The spelling of 1397757077 in words is "one billion, three hundred ninety-seven million, seven hundred fifty-seven thousand, seventy-seven".