11781007 has 16 divisors (see below), whose sum is σ = 14268160. Its totient is φ = 9502272.

The previous prime is 11781001. The next prime is 11781013. The reversal of 11781007 is 70018711.

It is an interprime number because it is at equal distance from previous prime (11781001) and next prime (11781013).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11781007 is a prime.

It is a super-3 number, since 3×11781007³ (a number of 22 digits) contains 333 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 (11781001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37483 + ... + 37795.

It is an arithmetic number, because the mean of its divisors is an integer number (891760).

Almost surely, 2^11781007 is an apocalyptic number.

11781007 is a deficient number, since it is larger than the sum of its proper divisors (2487153).

11781007 is a wasteful number, since it uses less digits than its factorization.

11781007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622.

The product of its (nonzero) digits is 392, while the sum is 25.

The square root of 11781007 is about 3432.3471561018. The cubic root of 11781007 is about 227.5415984795.

Adding to 11781007 its reverse (70018711), we get a palindrome (81799718).

The spelling of 11781007 in words is "eleven million, seven hundred eighty-one thousand, seven".