1631200973 has 2 divisors, whose sum is σ = 1631200974. Its totient is φ = 1631200972.

The previous prime is 1631200951. The next prime is 1631200979. The reversal of 1631200973 is 3790021361.

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., 1631109769 + 91204 = 40387^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631200973 - 2¹⁰ = 1631199949 is a prime.

It is a super-2 number, since 2×1631200973² = 5321633228632293458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631200979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815600486 + 815600487.

It is an arithmetic number, because the mean of its divisors is an integer number (815600487).

Almost surely, 2^1631200973 is an apocalyptic number.

It is an amenable number.

1631200973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631200973 is an equidigital number, since it uses as much as digits as its factorization.

1631200973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 1631200973 is about 40388.1291099254. The cubic root of 1631200973 is about 1177.1608880384.

The spelling of 1631200973 in words is "one billion, six hundred thirty-one million, two hundred thousand, nine hundred seventy-three".