345537649 has 2 divisors, whose sum is σ = 345537650. Its totient is φ = 345537648.

The previous prime is 345537593. The next prime is 345537659. The reversal of 345537649 is 946735543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345402225 + 135424 = 18585^2 + 368^2 .

It is a cyclic number.

It is not a de Polignac number, because 345537649 - 2²¹ = 343440497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345537599 and 345537608.

It is not a weakly prime, because it can be changed into another prime (345537659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172768824 + 172768825.

It is an arithmetic number, because the mean of its divisors is an integer number (172768825).

Almost surely, 2^345537649 is an apocalyptic number.

It is an amenable number.

345537649 is a deficient number, since it is larger than the sum of its proper divisors (1).

345537649 is an equidigital number, since it uses as much as digits as its factorization.

345537649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 46.

The square root of 345537649 is about 18588.6430112582. The cubic root of 345537649 is about 701.7220519870.

The spelling of 345537649 in words is "three hundred forty-five million, five hundred thirty-seven thousand, six hundred forty-nine".