194263631 has 2 divisors, whose sum is σ = 194263632. Its totient is φ = 194263630.

The previous prime is 194263627. The next prime is 194263697. The reversal of 194263631 is 136362491.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 194263631 - 2² = 194263627 is a prime.

It is a super-2 number, since 2×194263631² = 75476716658608322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 194263591 and 194263600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194260631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97131815 + 97131816.

It is an arithmetic number, because the mean of its divisors is an integer number (97131816).

Almost surely, 2^194263631 is an apocalyptic number.

194263631 is a deficient number, since it is larger than the sum of its proper divisors (1).

194263631 is an equidigital number, since it uses as much as digits as its factorization.

194263631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 194263631 is about 13937.8488655890. The cubic root of 194263631 is about 579.1581434995.

The spelling of 194263631 in words is "one hundred ninety-four million, two hundred sixty-three thousand, six hundred thirty-one".