9958790251 has 2 divisors, whose sum is σ = 9958790252. Its totient is φ = 9958790250.

The previous prime is 9958790249. The next prime is 9958790291. The reversal of 9958790251 is 1520978599.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9958790251 - 2¹ = 9958790249 is a prime.

Together with 9958790249, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9958790192 and 9958790201.

It is not a weakly prime, because it can be changed into another prime (9958790291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979395125 + 4979395126.

It is an arithmetic number, because the mean of its divisors is an integer number (4979395126).

Almost surely, 2^9958790251 is an apocalyptic number.

9958790251 is a deficient number, since it is larger than the sum of its proper divisors (1).

9958790251 is an equidigital number, since it uses as much as digits as its factorization.

9958790251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 55.

The square root of 9958790251 is about 99793.7385360424. The cubic root of 9958790251 is about 2151.4711583225.

The spelling of 9958790251 in words is "nine billion, nine hundred fifty-eight million, seven hundred ninety thousand, two hundred fifty-one".