1868407 has 2 divisors, whose sum is σ = 1868408. Its totient is φ = 1868406.

The previous prime is 1868387. The next prime is 1868423. The reversal of 1868407 is 7048681.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868407 is a prime.

It is an Ulam number.

It is equal to p₁₃₉₈₄₉ and since 1868407 and 139849 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934203 + 934204.

It is an arithmetic number, because the mean of its divisors is an integer number (934204).

2^1868407 is an apocalyptic number.

1868407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868407 is an equidigital number, since it uses as much as digits as its factorization.

1868407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 1868407 is about 1366.8968505341. The cubic root of 1868407 is about 123.1659029932.

The spelling of 1868407 in words is "one million, eight hundred sixty-eight thousand, four hundred seven".