988185761 has 2 divisors, whose sum is σ = 988185762. Its totient is φ = 988185760.

The previous prime is 988185727. The next prime is 988185769. The reversal of 988185761 is 167581889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 683508736 + 304677025 = 26144^2 + 17455^2 .

It is a cyclic number.

It is not a de Polignac number, because 988185761 - 2⁶ = 988185697 is a prime.

It is a super-2 number, since 2×988185761² = 1953022196486298242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (988185769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494092880 + 494092881.

It is an arithmetic number, because the mean of its divisors is an integer number (494092881).

Almost surely, 2^988185761 is an apocalyptic number.

It is an amenable number.

988185761 is a deficient number, since it is larger than the sum of its proper divisors (1).

988185761 is an equidigital number, since it uses as much as digits as its factorization.

988185761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 53.

The square root of 988185761 is about 31435.4220744688. The cubic root of 988185761 is about 996.0463092638.

The spelling of 988185761 in words is "nine hundred eighty-eight million, one hundred eighty-five thousand, seven hundred sixty-one".