936372821 has 2 divisors, whose sum is σ = 936372822. Its totient is φ = 936372820.

The previous prime is 936372817. The next prime is 936372823. The reversal of 936372821 is 128273639.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 905347921 + 31024900 = 30089^2 + 5570^2 .

It is a cyclic number.

It is not a de Polignac number, because 936372821 - 2² = 936372817 is a prime.

Together with 936372823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (936372823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 468186410 + 468186411.

It is an arithmetic number, because the mean of its divisors is an integer number (468186411).

Almost surely, 2^936372821 is an apocalyptic number.

It is an amenable number.

936372821 is a deficient number, since it is larger than the sum of its proper divisors (1).

936372821 is an equidigital number, since it uses as much as digits as its factorization.

936372821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 936372821 is about 30600.2094927469. The cubic root of 936372821 is about 978.3245079547.

The spelling of 936372821 in words is "nine hundred thirty-six million, three hundred seventy-two thousand, eight hundred twenty-one".