77531011 has 4 divisors (see below), whose sum is σ = 77652232. Its totient is φ = 77409792.

The previous prime is 77531009. The next prime is 77531017. The reversal of 77531011 is 11013577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11013577 = 293 ⋅37589.

It is a cyclic number.

It is not a de Polignac number, because 77531011 - 2¹ = 77531009 is a prime.

It is a super-2 number, since 2×77531011² = 12022115333364242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77531017) 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 3 ways as a sum of consecutive naturals, for example, 59646 + ... + 60931.

It is an arithmetic number, because the mean of its divisors is an integer number (19413058).

Almost surely, 2^77531011 is an apocalyptic number.

77531011 is a deficient number, since it is larger than the sum of its proper divisors (121221).

77531011 is a wasteful number, since it uses less digits than its factorization.

77531011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121220.

The product of its (nonzero) digits is 735, while the sum is 25.

The square root of 77531011 is about 8805.1695611158. The cubic root of 77531011 is about 426.4078085455.

Adding to 77531011 its reverse (11013577), we get a palindrome (88544588).

The spelling of 77531011 in words is "seventy-seven million, five hundred thirty-one thousand, eleven".