190890617669 has 2 divisors, whose sum is σ = 190890617670. Its totient is φ = 190890617668.

The previous prime is 190890617663. The next prime is 190890617677. The reversal of 190890617669 is 966716098091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189191941444 + 1698676225 = 434962^2 + 41215^2 .

It is a cyclic number.

It is not a de Polignac number, because 190890617669 - 2²⁰ = 190889569093 is a prime.

It is a super-2 number, since 2×190890617669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190890617663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95445308834 + 95445308835.

It is an arithmetic number, because the mean of its divisors is an integer number (95445308835).

Almost surely, 2^190890617669 is an apocalyptic number.

It is an amenable number.

190890617669 is a deficient number, since it is larger than the sum of its proper divisors (1).

190890617669 is an equidigital number, since it uses as much as digits as its factorization.

190890617669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 62.

The spelling of 190890617669 in words is "one hundred ninety billion, eight hundred ninety million, six hundred seventeen thousand, six hundred sixty-nine".