6936120421 has 2 divisors, whose sum is σ = 6936120422. Its totient is φ = 6936120420.

The previous prime is 6936120413. The next prime is 6936120463. The reversal of 6936120421 is 1240216396.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5698136196 + 1237984225 = 75486^2 + 35185^2 .

It is a cyclic number.

It is not a de Polignac number, because 6936120421 - 2³ = 6936120413 is a prime.

It is a super-2 number, since 2×6936120421² = 96219532989226434482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6936120721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3468060210 + 3468060211.

It is an arithmetic number, because the mean of its divisors is an integer number (3468060211).

Almost surely, 2^6936120421 is an apocalyptic number.

It is an amenable number.

6936120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6936120421 is an equidigital number, since it uses as much as digits as its factorization.

6936120421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 6936120421 is about 83283.3742171869. The cubic root of 6936120421 is about 1907.0944758884.

The spelling of 6936120421 in words is "six billion, nine hundred thirty-six million, one hundred twenty thousand, four hundred twenty-one".