77142207 has 8 divisors (see below), whose sum is σ = 107328384. Its totient is φ = 49192088.

The previous prime is 77142199. The next prime is 77142211. The reversal of 77142207 is 70224177.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77142207 - 2³ = 77142199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77142287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558933 + ... + 559070.

It is an arithmetic number, because the mean of its divisors is an integer number (13416048).

Almost surely, 2^77142207 is an apocalyptic number.

77142207 is a deficient number, since it is larger than the sum of its proper divisors (30186177).

77142207 is a wasteful number, since it uses less digits than its factorization.

77142207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118029.

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 77142207 is about 8783.0636454486. The cubic root of 77142207 is about 425.6938277001.

The spelling of 77142207 in words is "seventy-seven million, one hundred forty-two thousand, two hundred seven".