1697152081 has 2 divisors, whose sum is σ = 1697152082. Its totient is φ = 1697152080.

The previous prime is 1697152063. The next prime is 1697152099. The reversal of 1697152081 is 1802517961.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1697152063) and next prime (1697152099).

It can be written as a sum of positive squares in only one way, i.e., 1696121856 + 1030225 = 41184^2 + 1015^2 .

It is an emirp because it is prime and its reverse (1802517961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1697152081 - 2¹¹ = 1697150033 is a prime.

It is a super-2 number, since 2×1697152081² = 5760650372085261122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1697152021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848576040 + 848576041.

It is an arithmetic number, because the mean of its divisors is an integer number (848576041).

Almost surely, 2^1697152081 is an apocalyptic number.

It is an amenable number.

1697152081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1697152081 is an equidigital number, since it uses as much as digits as its factorization.

1697152081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 40.

The square root of 1697152081 is about 41196.5056891965. The cubic root of 1697152081 is about 1192.8163599176.

The spelling of 1697152081 in words is "one billion, six hundred ninety-seven million, one hundred fifty-two thousand, eighty-one".