988747957 has 2 divisors, whose sum is σ = 988747958. Its totient is φ = 988747956.

The previous prime is 988747939. The next prime is 988747961. The reversal of 988747957 is 759747889.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 555733476 + 433014481 = 23574^2 + 20809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-988747957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988747937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494373978 + 494373979.

It is an arithmetic number, because the mean of its divisors is an integer number (494373979).

Almost surely, 2^988747957 is an apocalyptic number.

It is an amenable number.

988747957 is a deficient number, since it is larger than the sum of its proper divisors (1).

988747957 is an equidigital number, since it uses as much as digits as its factorization.

988747957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35562240, while the sum is 64.

The square root of 988747957 is about 31444.3628811270. The cubic root of 988747957 is about 996.2351627884.

The spelling of 988747957 in words is "nine hundred eighty-eight million, seven hundred forty-seven thousand, nine hundred fifty-seven".