989951051 has 2 divisors, whose sum is σ = 989951052. Its totient is φ = 989951050.

The previous prime is 989951023. The next prime is 989951059. The reversal of 989951051 is 150159989.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989951051 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 989950987 and 989951005.

It is not a weakly prime, because it can be changed into another prime (989951059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494975525 + 494975526.

It is an arithmetic number, because the mean of its divisors is an integer number (494975526).

Almost surely, 2^989951051 is an apocalyptic number.

989951051 is a deficient number, since it is larger than the sum of its proper divisors (1).

989951051 is an equidigital number, since it uses as much as digits as its factorization.

989951051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 47.

The square root of 989951051 is about 31463.4875848181. The cubic root of 989951051 is about 996.6390671184.

The spelling of 989951051 in words is "nine hundred eighty-nine million, nine hundred fifty-one thousand, fifty-one".