9990388151 has 2 divisors, whose sum is σ = 9990388152. Its totient is φ = 9990388150.

The previous prime is 9990388139. The next prime is 9990388153. The reversal of 9990388151 is 1518830999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9990388151 is a prime.

Together with 9990388153, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9990388093 and 9990388102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9990388153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995194075 + 4995194076.

It is an arithmetic number, because the mean of its divisors is an integer number (4995194076).

Almost surely, 2^9990388151 is an apocalyptic number.

9990388151 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990388151 is an equidigital number, since it uses as much as digits as its factorization.

9990388151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 53.

The square root of 9990388151 is about 99951.9292009914. The cubic root of 9990388151 is about 2153.7441987240.

The spelling of 9990388151 in words is "nine billion, nine hundred ninety million, three hundred eighty-eight thousand, one hundred fifty-one".