84380772009 has 4 divisors (see below), whose sum is σ = 112507696016. Its totient is φ = 56253848004.

The previous prime is 84380772001. The next prime is 84380772017. The reversal of 84380772009 is 90027708348.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (84380772001) and next prime (84380772017).

It is not a de Polignac number, because 84380772009 - 2³ = 84380772001 is a prime.

It is a super-2 number, since 2×84380772009² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84380772001) 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, 14063461999 + ... + 14063462004.

It is an arithmetic number, because the mean of its divisors is an integer number (28126924004).

Almost surely, 2^84380772009 is an apocalyptic number.

It is an amenable number.

84380772009 is a deficient number, since it is larger than the sum of its proper divisors (28126924007).

84380772009 is a wasteful number, since it uses less digits than its factorization.

84380772009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28126924006.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 84380772009 in words is "eighty-four billion, three hundred eighty million, seven hundred seventy-two thousand, nine".