989347951 has 4 divisors (see below), whose sum is σ = 991494504. Its totient is φ = 987201400.

The previous prime is 989347949. The next prime is 989347969. The reversal of 989347951 is 159743989.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 989347951 - 2¹ = 989347949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989347892 and 989347901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989347901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072585 + ... + 1073506.

It is an arithmetic number, because the mean of its divisors is an integer number (247873626).

Almost surely, 2^989347951 is an apocalyptic number.

989347951 is a deficient number, since it is larger than the sum of its proper divisors (2146553).

989347951 is a wasteful number, since it uses less digits than its factorization.

989347951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146552.

The product of its digits is 2449440, while the sum is 55.

The square root of 989347951 is about 31453.9019995930. The cubic root of 989347951 is about 996.4366345084.

The spelling of 989347951 in words is "nine hundred eighty-nine million, three hundred forty-seven thousand, nine hundred fifty-one".