999961277 has 10 divisors (see below), whose sum is σ = 1166554878. Its totient is φ = 857107608.

The previous prime is 999961273. The next prime is 999961289. The reversal of 999961277 is 772169999.

It can be written as a sum of positive squares in only one way, i.e., 736905316 + 263055961 = 27146^2 + 16219^2 .

It is not a de Polignac number, because 999961277 - 2² = 999961273 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999961273) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 205838 + ... + 210639.

Almost surely, 2^999961277 is an apocalyptic number.

It is an amenable number.

999961277 is a deficient number, since it is larger than the sum of its proper divisors (166593601).

999961277 is an frugal number, since it uses more digits than its factorization.

999961277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416505 (or 416484 counting only the distinct ones).

The product of its digits is 3857868, while the sum is 59.

The square root of 999961277 is about 31622.1643313673. The cubic root of 999961277 is about 999.9870921667.

The spelling of 999961277 in words is "nine hundred ninety-nine million, nine hundred sixty-one thousand, two hundred seventy-seven".