1988190713 has 2 divisors, whose sum is σ = 1988190714. Its totient is φ = 1988190712.

The previous prime is 1988190703. The next prime is 1988190731. The reversal of 1988190713 is 3170918891.

Together with next prime (1988190731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1517647849 + 470542864 = 38957^2 + 21692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1988190713 - 2¹⁴ = 1988174329 is a prime.

It is a super-2 number, since 2×1988190713² = 7905804622518896738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1988190703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994095356 + 994095357.

It is an arithmetic number, because the mean of its divisors is an integer number (994095357).

Almost surely, 2^1988190713 is an apocalyptic number.

It is an amenable number.

1988190713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988190713 is an equidigital number, since it uses as much as digits as its factorization.

1988190713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 47.

The square root of 1988190713 is about 44589.1322297261. The cubic root of 1988190713 is about 1257.4363581734.

The spelling of 1988190713 in words is "one billion, nine hundred eighty-eight million, one hundred ninety thousand, seven hundred thirteen".