1965628057 has 2 divisors, whose sum is σ = 1965628058. Its totient is φ = 1965628056.

The previous prime is 1965628037. The next prime is 1965628061. The reversal of 1965628057 is 7508265691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1955762176 + 9865881 = 44224^2 + 3141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1965628057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1965628057.

It is not a weakly prime, because it can be changed into another prime (1965628037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982814028 + 982814029.

It is an arithmetic number, because the mean of its divisors is an integer number (982814029).

Almost surely, 2^1965628057 is an apocalyptic number.

It is an amenable number.

1965628057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965628057 is an equidigital number, since it uses as much as digits as its factorization.

1965628057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 1965628057 is about 44335.4041032672. The cubic root of 1965628057 is about 1252.6616473109.

The spelling of 1965628057 in words is "one billion, nine hundred sixty-five million, six hundred twenty-eight thousand, fifty-seven".