1699725961 has 2 divisors, whose sum is σ = 1699725962. Its totient is φ = 1699725960.

The previous prime is 1699725893. The next prime is 1699725991. The reversal of 1699725961 is 1695279961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969699600 + 730026361 = 31140^2 + 27019^2 .

It is a cyclic number.

It is not a de Polignac number, because 1699725961 - 2⁹ = 1699725449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1699725991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849862980 + 849862981.

It is an arithmetic number, because the mean of its divisors is an integer number (849862981).

Almost surely, 2^1699725961 is an apocalyptic number.

It is an amenable number.

1699725961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1699725961 is an equidigital number, since it uses as much as digits as its factorization.

1699725961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 55.

The square root of 1699725961 is about 41227.7329112334. The cubic root of 1699725961 is about 1193.4190588850.

The spelling of 1699725961 in words is "one billion, six hundred ninety-nine million, seven hundred twenty-five thousand, nine hundred sixty-one".