3151693661 has 2 divisors, whose sum is σ = 3151693662. Its totient is φ = 3151693660.

The previous prime is 3151693627. The next prime is 3151693673. The reversal of 3151693661 is 1663961513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3074148025 + 77545636 = 55445^2 + 8806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3151693661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3151693681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1575846830 + 1575846831.

It is an arithmetic number, because the mean of its divisors is an integer number (1575846831).

Almost surely, 2^3151693661 is an apocalyptic number.

It is an amenable number.

3151693661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3151693661 is an equidigital number, since it uses as much as digits as its factorization.

3151693661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 41.

The square root of 3151693661 is about 56139.9471054257. The cubic root of 3151693661 is about 1466.1598848678.

The spelling of 3151693661 in words is "three billion, one hundred fifty-one million, six hundred ninety-three thousand, six hundred sixty-one".