3690401669 has 2 divisors, whose sum is σ = 3690401670. Its totient is φ = 3690401668.

The previous prime is 3690401657. The next prime is 3690401707. The reversal of 3690401669 is 9661040963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3604561444 + 85840225 = 60038^2 + 9265^2 .

It is a cyclic number.

It is not a de Polignac number, because 3690401669 - 2²⁴ = 3673624453 is a prime.

It is a super-2 number, since 2×3690401669² = 27238128957115971122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3690401269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1845200834 + 1845200835.

It is an arithmetic number, because the mean of its divisors is an integer number (1845200835).

Almost surely, 2^3690401669 is an apocalyptic number.

It is an amenable number.

3690401669 is a deficient number, since it is larger than the sum of its proper divisors (1).

3690401669 is an equidigital number, since it uses as much as digits as its factorization.

3690401669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 3690401669 is about 60748.6762736440. The cubic root of 3690401669 is about 1545.3417786482.

The spelling of 3690401669 in words is "three billion, six hundred ninety million, four hundred one thousand, six hundred sixty-nine".