1630143397 has 2 divisors, whose sum is σ = 1630143398. Its totient is φ = 1630143396.

The previous prime is 1630143353. The next prime is 1630143421. The reversal of 1630143397 is 7933410361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1630059876 + 83521 = 40374^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630143397 - 2⁷ = 1630143269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630141397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815071698 + 815071699.

It is an arithmetic number, because the mean of its divisors is an integer number (815071699).

Almost surely, 2^1630143397 is an apocalyptic number.

It is an amenable number.

1630143397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630143397 is an equidigital number, since it uses as much as digits as its factorization.

1630143397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 1630143397 is about 40375.0343281588. The cubic root of 1630143397 is about 1176.9064321152.

The spelling of 1630143397 in words is "one billion, six hundred thirty million, one hundred forty-three thousand, three hundred ninety-seven".