9977754197 has 2 divisors, whose sum is σ = 9977754198. Its totient is φ = 9977754196.

The previous prime is 9977754169. The next prime is 9977754203. The reversal of 9977754197 is 7914577799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9652276516 + 325477681 = 98246^2 + 18041^2 .

It is an emirp because it is prime and its reverse (7914577799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9977754197 - 2¹⁰ = 9977753173 is a prime.

It is a super-2 number, since 2×9977754197² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9977750197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988877098 + 4988877099.

It is an arithmetic number, because the mean of its divisors is an integer number (4988877099).

Almost surely, 2^9977754197 is an apocalyptic number.

It is an amenable number.

9977754197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977754197 is an equidigital number, since it uses as much as digits as its factorization.

9977754197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35006580, while the sum is 65.

The square root of 9977754197 is about 99888.7090566296. The cubic root of 9977754197 is about 2152.8359329343.

The spelling of 9977754197 in words is "nine billion, nine hundred seventy-seven million, seven hundred fifty-four thousand, one hundred ninety-seven".