988620851 has 2 divisors, whose sum is σ = 988620852. Its totient is φ = 988620850.

The previous prime is 988620833. The next prime is 988620887. The reversal of 988620851 is 158026889.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-988620851 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 988620796 and 988620805.

It is not a weakly prime, because it can be changed into another prime (988620151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494310425 + 494310426.

It is an arithmetic number, because the mean of its divisors is an integer number (494310426).

Almost surely, 2^988620851 is an apocalyptic number.

988620851 is a deficient number, since it is larger than the sum of its proper divisors (1).

988620851 is an equidigital number, since it uses as much as digits as its factorization.

988620851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 988620851 is about 31442.3416907838. The cubic root of 988620851 is about 996.1924714593.

The spelling of 988620851 in words is "nine hundred eighty-eight million, six hundred twenty thousand, eight hundred fifty-one".