345473977 has 2 divisors, whose sum is σ = 345473978. Its totient is φ = 345473976.

The previous prime is 345473959. The next prime is 345474011. The reversal of 345473977 is 779374543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216060601 + 129413376 = 14699^2 + 11376^2 .

It is a cyclic number.

It is not a de Polignac number, because 345473977 - 2²³ = 337085369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345473977.

It is not a weakly prime, because it can be changed into another prime (345479977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172736988 + 172736989.

It is an arithmetic number, because the mean of its divisors is an integer number (172736989).

Almost surely, 2^345473977 is an apocalyptic number.

It is an amenable number.

345473977 is a deficient number, since it is larger than the sum of its proper divisors (1).

345473977 is an equidigital number, since it uses as much as digits as its factorization.

345473977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 49.

The square root of 345473977 is about 18586.9302737165. The cubic root of 345473977 is about 701.6789473825.

The spelling of 345473977 in words is "three hundred forty-five million, four hundred seventy-three thousand, nine hundred seventy-seven".