208240979 has 2 divisors, whose sum is σ = 208240980. Its totient is φ = 208240978.

The previous prime is 208240943. The next prime is 208240993. The reversal of 208240979 is 979042802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208240979 - 2⁸ = 208240723 is a prime.

It is not a weakly prime, because it can be changed into another prime (208240999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104120489 + 104120490.

It is an arithmetic number, because the mean of its divisors is an integer number (104120490).

Almost surely, 2^208240979 is an apocalyptic number.

208240979 is a deficient number, since it is larger than the sum of its proper divisors (1).

208240979 is an equidigital number, since it uses as much as digits as its factorization.

208240979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 208240979 is about 14430.5571271521. The cubic root of 208240979 is about 592.7279392650.

The spelling of 208240979 in words is "two hundred eight million, two hundred forty thousand, nine hundred seventy-nine".