1607089681 has 2 divisors, whose sum is σ = 1607089682. Its totient is φ = 1607089680.

The previous prime is 1607089657. The next prime is 1607089699. The reversal of 1607089681 is 1869807061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1128355281 + 478734400 = 33591^2 + 21880^2 .

It is an emirp because it is prime and its reverse (1869807061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1607089681 - 2⁷ = 1607089553 is a prime.

It is a super-2 number, since 2×1607089681² = 5165474485553363522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1607089651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803544840 + 803544841.

It is an arithmetic number, because the mean of its divisors is an integer number (803544841).

Almost surely, 2^1607089681 is an apocalyptic number.

It is an amenable number.

1607089681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1607089681 is an equidigital number, since it uses as much as digits as its factorization.

1607089681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 1607089681 is about 40088.5230583518. The cubic root of 1607089681 is about 1171.3320793746.

The spelling of 1607089681 in words is "one billion, six hundred seven million, eighty-nine thousand, six hundred eighty-one".