3951213697 has 2 divisors, whose sum is σ = 3951213698. Its totient is φ = 3951213696.

The previous prime is 3951213671. The next prime is 3951213823. The reversal of 3951213697 is 7963121593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2670719041 + 1280494656 = 51679^2 + 35784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3951213697 is a prime.

It is a super-4 number, since 4×3951213697⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (3951213997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975606848 + 1975606849.

It is an arithmetic number, because the mean of its divisors is an integer number (1975606849).

Almost surely, 2^3951213697 is an apocalyptic number.

It is an amenable number.

3951213697 is a deficient number, since it is larger than the sum of its proper divisors (1).

3951213697 is an equidigital number, since it uses as much as digits as its factorization.

3951213697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 46.

The square root of 3951213697 is about 62858.6803631766. The cubic root of 3951213697 is about 1580.9210163187.

The spelling of 3951213697 in words is "three billion, nine hundred fifty-one million, two hundred thirteen thousand, six hundred ninety-seven".