1631400193 has 2 divisors, whose sum is σ = 1631400194. Its totient is φ = 1631400192.

The previous prime is 1631400187. The next prime is 1631400229. The reversal of 1631400193 is 3910041361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1546612929 + 84787264 = 39327^2 + 9208^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631400193 - 2¹⁷ = 1631269121 is a prime.

It is a super-2 number, since 2×1631400193² = 5322933179440874498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1631400163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815700096 + 815700097.

It is an arithmetic number, because the mean of its divisors is an integer number (815700097).

Almost surely, 2^1631400193 is an apocalyptic number.

It is an amenable number.

1631400193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631400193 is an equidigital number, since it uses as much as digits as its factorization.

1631400193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1631400193 is about 40390.5953533740. The cubic root of 1631400193 is about 1177.2088086502.

The spelling of 1631400193 in words is "one billion, six hundred thirty-one million, four hundred thousand, one hundred ninety-three".