345553477 has 2 divisors, whose sum is σ = 345553478. Its totient is φ = 345553476.

The previous prime is 345553451. The next prime is 345553489. The reversal of 345553477 is 774355543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 321090561 + 24462916 = 17919^2 + 4946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345553477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345553177) 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 as a sum of consecutive naturals, namely, 172776738 + 172776739.

It is an arithmetic number, because the mean of its divisors is an integer number (172776739).

Almost surely, 2^345553477 is an apocalyptic number.

It is an amenable number.

345553477 is a deficient number, since it is larger than the sum of its proper divisors (1).

345553477 is an equidigital number, since it uses as much as digits as its factorization.

345553477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 43.

The square root of 345553477 is about 18589.0687502091. The cubic root of 345553477 is about 701.7327663883.

The spelling of 345553477 in words is "three hundred forty-five million, five hundred fifty-three thousand, four hundred seventy-seven".