346636639 has 2 divisors, whose sum is σ = 346636640. Its totient is φ = 346636638.

The previous prime is 346636621. The next prime is 346636643. The reversal of 346636639 is 936636643.

It is a strong prime.

It is an emirp because it is prime and its reverse (936636643) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 346636639 - 2⁵ = 346636607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346636649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173318319 + 173318320.

It is an arithmetic number, because the mean of its divisors is an integer number (173318320).

Almost surely, 2^346636639 is an apocalyptic number.

346636639 is a deficient number, since it is larger than the sum of its proper divisors (1).

346636639 is an equidigital number, since it uses as much as digits as its factorization.

346636639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 46.

The square root of 346636639 is about 18618.1803353604. The cubic root of 346636639 is about 702.4652120749.

The spelling of 346636639 in words is "three hundred forty-six million, six hundred thirty-six thousand, six hundred thirty-nine".