78111701 has 4 divisors (see below), whose sum is σ = 78316032. Its totient is φ = 77907372.

The previous prime is 78111673. The next prime is 78111707. The reversal of 78111701 is 10711187.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78111701 - 2⁶ = 78111637 is a prime.

It is a super-2 number, since 2×78111701² = 12202875666226802, 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 (78111707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101591 + ... + 102356.

It is an arithmetic number, because the mean of its divisors is an integer number (19579008).

Almost surely, 2^78111701 is an apocalyptic number.

It is an amenable number.

78111701 is a deficient number, since it is larger than the sum of its proper divisors (204331).

78111701 is a wasteful number, since it uses less digits than its factorization.

78111701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204330.

The product of its (nonzero) digits is 392, while the sum is 26.

The square root of 78111701 is about 8838.0824277668. The cubic root of 78111701 is about 427.4697282579.

Adding to 78111701 its reverse (10711187), we get a palindrome (88822888).

The spelling of 78111701 in words is "seventy-eight million, one hundred eleven thousand, seven hundred one".