9954201557 has 2 divisors, whose sum is σ = 9954201558. Its totient is φ = 9954201556.

The previous prime is 9954201553. The next prime is 9954201559. The reversal of 9954201557 is 7551024599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5482069681 + 4472131876 = 74041^2 + 66874^2 .

It is a cyclic number.

It is not a de Polignac number, because 9954201557 - 2² = 9954201553 is a prime.

It is a super-2 number, since 2×9954201557² (a number of 21 digits) contains 22 as substring.

Together with 9954201559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9954201553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4977100778 + 4977100779.

It is an arithmetic number, because the mean of its divisors is an integer number (4977100779).

Almost surely, 2^9954201557 is an apocalyptic number.

It is an amenable number.

9954201557 is a deficient number, since it is larger than the sum of its proper divisors (1).

9954201557 is an equidigital number, since it uses as much as digits as its factorization.

9954201557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567000, while the sum is 47.

The square root of 9954201557 is about 99770.7449957151. The cubic root of 9954201557 is about 2151.1406643824.

The spelling of 9954201557 in words is "nine billion, nine hundred fifty-four million, two hundred one thousand, five hundred fifty-seven".