2028669497 has 4 divisors (see below), whose sum is σ = 2061926436. Its totient is φ = 1995412560.

The previous prime is 2028669493. The next prime is 2028669527. The reversal of 2028669497 is 7949668202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122124601 + 1906544896 = 11051^2 + 43664^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028669497 - 2² = 2028669493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028669493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16628378 + ... + 16628499.

It is an arithmetic number, because the mean of its divisors is an integer number (515481609).

Almost surely, 2^2028669497 is an apocalyptic number.

It is an amenable number.

2028669497 is a deficient number, since it is larger than the sum of its proper divisors (33256939).

2028669497 is an equidigital number, since it uses as much as digits as its factorization.

2028669497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33256938.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 2028669497 is about 45040.7537348122. The cubic root of 2028669497 is about 1265.9127278416.

The spelling of 2028669497 in words is "two billion, twenty-eight million, six hundred sixty-nine thousand, four hundred ninety-seven".