77012001 has 24 divisors (see below), whose sum is σ = 121627584. Its totient is φ = 46568160.

The previous prime is 77011999. The next prime is 77012009. The reversal of 77012001 is 10021077.

It is not a de Polignac number, because 77012001 - 2¹ = 77011999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77012009) 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 in 23 ways as a sum of consecutive naturals, for example, 86380 + ... + 87266.

It is an arithmetic number, because the mean of its divisors is an integer number (5067816).

Almost surely, 2^77012001 is an apocalyptic number.

It is an amenable number.

77012001 is a deficient number, since it is larger than the sum of its proper divisors (44615583).

77012001 is a wasteful number, since it uses less digits than its factorization.

77012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1778 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 77012001 is about 8775.6481811887. The cubic root of 77012001 is about 425.4541875732.

Adding to 77012001 its reverse (10021077), we get a palindrome (87033078).

The spelling of 77012001 in words is "seventy-seven million, twelve thousand, one".