999979297 has 2 divisors, whose sum is σ = 999979298. Its totient is φ = 999979296.

The previous prime is 999979273. The next prime is 999979313. The reversal of 999979297 is 792979999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748788496 + 251190801 = 27364^2 + 15849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999979297 is a prime.

It is a super-2 number, since 2×999979297² = 1999917188857228418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999979237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499989648 + 499989649.

It is an arithmetic number, because the mean of its divisors is an integer number (499989649).

Almost surely, 2^999979297 is an apocalyptic number.

It is an amenable number.

999979297 is a deficient number, since it is larger than the sum of its proper divisors (1).

999979297 is an equidigital number, since it uses as much as digits as its factorization.

999979297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52081218, while the sum is 70.

The square root of 999979297 is about 31622.4492568175. The cubic root of 999979297 is about 999.9930989524.

The spelling of 999979297 in words is "nine hundred ninety-nine million, nine hundred seventy-nine thousand, two hundred ninety-seven".