999961477 has 2 divisors, whose sum is σ = 999961478. Its totient is φ = 999961476.

The previous prime is 999961463. The next prime is 999961511. The reversal of 999961477 is 774169999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 592971201 + 406990276 = 24351^2 + 20174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999961477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999961577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499980738 + 499980739.

It is an arithmetic number, because the mean of its divisors is an integer number (499980739).

Almost surely, 2^999961477 is an apocalyptic number.

It is an amenable number.

999961477 is a deficient number, since it is larger than the sum of its proper divisors (1).

999961477 is an equidigital number, since it uses as much as digits as its factorization.

999961477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7715736, while the sum is 61.

The square root of 999961477 is about 31622.1674937061. The cubic root of 999961477 is about 999.9871588351.

The spelling of 999961477 in words is "nine hundred ninety-nine million, nine hundred sixty-one thousand, four hundred seventy-seven".