830720477 has 2 divisors, whose sum is σ = 830720478. Its totient is φ = 830720476.

The previous prime is 830720447. The next prime is 830720491. The reversal of 830720477 is 774027038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513203716 + 317516761 = 22654^2 + 17819^2 .

It is a cyclic number.

It is not a de Polignac number, because 830720477 - 2¹⁸ = 830458333 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 830720477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (830720447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415360238 + 415360239.

It is an arithmetic number, because the mean of its divisors is an integer number (415360239).

Almost surely, 2^830720477 is an apocalyptic number.

It is an amenable number.

830720477 is a deficient number, since it is larger than the sum of its proper divisors (1).

830720477 is an equidigital number, since it uses as much as digits as its factorization.

830720477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 830720477 is about 28822.2219303093. The cubic root of 830720477 is about 940.0514823923.

The spelling of 830720477 in words is "eight hundred thirty million, seven hundred twenty thousand, four hundred seventy-seven".