1868197351 has 2 divisors, whose sum is σ = 1868197352. Its totient is φ = 1868197350.

The previous prime is 1868197301. The next prime is 1868197367. The reversal of 1868197351 is 1537918681.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1868197351 - 2⁷ = 1868197223 is a prime.

It is a super-2 number, since 2×1868197351² = 6980322684566834402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1868197295 and 1868197304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868197301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934098675 + 934098676.

It is an arithmetic number, because the mean of its divisors is an integer number (934098676).

Almost surely, 2^1868197351 is an apocalyptic number.

1868197351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868197351 is an equidigital number, since it uses as much as digits as its factorization.

1868197351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 49.

The square root of 1868197351 is about 43222.6485884426. The cubic root of 1868197351 is about 1231.6129611427.

The spelling of 1868197351 in words is "one billion, eight hundred sixty-eight million, one hundred ninety-seven thousand, three hundred fifty-one".