77000002 has 4 divisors (see below), whose sum is σ = 115500006. Its totient is φ = 38500000.

The previous prime is 76999981. The next prime is 77000003. The reversal of 77000002 is 20000077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 75533481 + 1466521 = 8691^2 + 1211^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77000002.

It is not an unprimeable number, because it can be changed into a prime (77000003) 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 as a sum of consecutive naturals, namely, 19249999 + ... + 19250002.

Almost surely, 2^77000002 is an apocalyptic number.

77000002 is a deficient number, since it is larger than the sum of its proper divisors (38500004).

77000002 is a wasteful number, since it uses less digits than its factorization.

77000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38500003.

The product of its (nonzero) digits is 98, while the sum is 16.

The square root of 77000002 is about 8774.9645013527. The cubic root of 77000002 is about 425.4320901949.

Adding to 77000002 its reverse (20000077), we get a palindrome (97000079).

The spelling of 77000002 in words is "seventy-seven million, two", and thus it is an aban number and an uban number.