78403111 has 8 divisors (see below), whose sum is σ = 82487664. Its totient is φ = 74422080.

The previous prime is 78403103. The next prime is 78403121. The reversal of 78403111 is 11130487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78403111 - 2³ = 78403103 is a prime.

It is a super-2 number, since 2×78403111² = 12294095628956642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78403121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24325 + ... + 27358.

It is an arithmetic number, because the mean of its divisors is an integer number (10310958).

Almost surely, 2^78403111 is an apocalyptic number.

78403111 is a deficient number, since it is larger than the sum of its proper divisors (4084553).

78403111 is a wasteful number, since it uses less digits than its factorization.

78403111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51761.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 78403111 is about 8854.5531225466. The cubic root of 78403111 is about 428.0006532584. Note that the first 3 decimals are identical.

Adding to 78403111 its reverse (11130487), we get a palindrome (89533598).

The spelling of 78403111 in words is "seventy-eight million, four hundred three thousand, one hundred eleven".