807721047 has 36 divisors (see below), whose sum is σ = 1359349680. Its totient is φ = 460821312.

The previous prime is 807721009. The next prime is 807721081. The reversal of 807721047 is 740127708.

It is not a de Polignac number, because 807721047 - 2⁸ = 807720791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (807721147) 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 in 35 ways as a sum of consecutive naturals, for example, 404283 + ... + 406275.

Almost surely, 2^807721047 is an apocalyptic number.

807721047 is a deficient number, since it is larger than the sum of its proper divisors (551628633).

807721047 is a wasteful number, since it uses less digits than its factorization.

807721047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2932 (or 2922 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 807721047 is about 28420.4336173817. The cubic root of 807721047 is about 931.2947038462.

The spelling of 807721047 in words is "eight hundred seven million, seven hundred twenty-one thousand, forty-seven".