1997772353 has 2 divisors, whose sum is σ = 1997772354. Its totient is φ = 1997772352.

The previous prime is 1997772349. The next prime is 1997772367. The reversal of 1997772353 is 3532777991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1983544369 + 14227984 = 44537^2 + 3772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1997772353 - 2² = 1997772349 is a prime.

It is a super-2 number, since 2×1997772353² = 7982188748822313218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1997772295 and 1997772304.

It is not a weakly prime, because it can be changed into another prime (1997772373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998886176 + 998886177.

It is an arithmetic number, because the mean of its divisors is an integer number (998886177).

Almost surely, 2^1997772353 is an apocalyptic number.

It is an amenable number.

1997772353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997772353 is an equidigital number, since it uses as much as digits as its factorization.

1997772353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2500470, while the sum is 53.

The square root of 1997772353 is about 44696.4467603410. The cubic root of 1997772353 is about 1259.4530995560.

The spelling of 1997772353 in words is "one billion, nine hundred ninety-seven million, seven hundred seventy-two thousand, three hundred fifty-three".