3999870451 has 2 divisors, whose sum is σ = 3999870452. Its totient is φ = 3999870450.

The previous prime is 3999870439. The next prime is 3999870473. The reversal of 3999870451 is 1540789993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3999870451 - 2⁵ = 3999870419 is a prime.

It is a super-4 number, since 4×3999870451⁴ (a number of 40 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3999870392 and 3999870401.

It is not a weakly prime, because it can be changed into another prime (3999870851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999935225 + 1999935226.

It is an arithmetic number, because the mean of its divisors is an integer number (1999935226).

Almost surely, 2^3999870451 is an apocalyptic number.

3999870451 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999870451 is an equidigital number, since it uses as much as digits as its factorization.

3999870451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 3999870451 is about 63244.5290203034. The cubic root of 3999870451 is about 1587.3839145983.

The spelling of 3999870451 in words is "three billion, nine hundred ninety-nine million, eight hundred seventy thousand, four hundred fifty-one".