1997464237 has 2 divisors, whose sum is σ = 1997464238. Its totient is φ = 1997464236.

The previous prime is 1997464219. The next prime is 1997464303. The reversal of 1997464237 is 7324647991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1977936676 + 19527561 = 44474^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997464237 - 2¹¹ = 1997462189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997461237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998732118 + 998732119.

It is an arithmetic number, because the mean of its divisors is an integer number (998732119).

Almost surely, 2^1997464237 is an apocalyptic number.

It is an amenable number.

1997464237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997464237 is an equidigital number, since it uses as much as digits as its factorization.

1997464237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 52.

The square root of 1997464237 is about 44692.9998657508. Note that the first 3 decimals coincide. The cubic root of 1997464237 is about 1259.3883478335.

The spelling of 1997464237 in words is "one billion, nine hundred ninety-seven million, four hundred sixty-four thousand, two hundred thirty-seven".