1973557 has 2 divisors, whose sum is σ = 1973558. Its totient is φ = 1973556.

The previous prime is 1973539. The next prime is 1973563. The reversal of 1973557 is 7553791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 904401 = 1034^2 + 951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1973557 is a prime.

It is a d-powerful number, because it can be written as 1 + 9³ + 7 + 3⁹ + 5 + 5⁹ + 7 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986778 + 986779.

It is an arithmetic number, because the mean of its divisors is an integer number (986779).

2^1973557 is an apocalyptic number.

It is an amenable number.

1973557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973557 is an equidigital number, since it uses as much as digits as its factorization.

1973557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33075, while the sum is 37.

The square root of 1973557 is about 1404.8334420849. The cubic root of 1973557 is about 125.4343714895.

The spelling of 1973557 in words is "one million, nine hundred seventy-three thousand, five hundred fifty-seven".