77223007 has 4 divisors (see below), whose sum is σ = 77380776. Its totient is φ = 77065240.

The previous prime is 77222989. The next prime is 77223017. The reversal of 77223007 is 70032277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70032277 = 7 ⋅10004611.

It is a cyclic number.

It is not a de Polignac number, because 77223007 - 2⁷ = 77222879 is a prime.

It is a super-3 number, since 3×77223007³ (a number of 25 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 (77223017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78148 + ... + 79129.

It is an arithmetic number, because the mean of its divisors is an integer number (19345194).

Almost surely, 2^77223007 is an apocalyptic number.

77223007 is a deficient number, since it is larger than the sum of its proper divisors (157769).

77223007 is a wasteful number, since it uses less digits than its factorization.

77223007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157768.

The product of its (nonzero) digits is 4116, while the sum is 28.

The square root of 77223007 is about 8787.6622033394. The cubic root of 77223007 is about 425.8424020478.

The spelling of 77223007 in words is "seventy-seven million, two hundred twenty-three thousand, seven".