1607071681 has 2 divisors, whose sum is σ = 1607071682. Its totient is φ = 1607071680.

The previous prime is 1607071643. The next prime is 1607071717. The reversal of 1607071681 is 1861707061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1074200625 + 532871056 = 32775^2 + 23084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1607071681 - 2⁷ = 1607071553 is a prime.

It is a super-2 number, since 2×1607071681² = 5165358775744331522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1607071681.

It is not a weakly prime, because it can be changed into another prime (1607071601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803535840 + 803535841.

It is an arithmetic number, because the mean of its divisors is an integer number (803535841).

Almost surely, 2^1607071681 is an apocalyptic number.

It is an amenable number.

1607071681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1607071681 is an equidigital number, since it uses as much as digits as its factorization.

1607071681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 1607071681 is about 40088.2985545658. The cubic root of 1607071681 is about 1171.3277062405.

The spelling of 1607071681 in words is "one billion, six hundred seven million, seventy-one thousand, six hundred eighty-one".