836456381 has 2 divisors, whose sum is σ = 836456382. Its totient is φ = 836456380.

The previous prime is 836456363. The next prime is 836456429. The reversal of 836456381 is 183654638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 470499481 + 365956900 = 21691^2 + 19130^2 .

It is a cyclic number.

It is not a de Polignac number, because 836456381 - 2¹⁰ = 836455357 is a prime.

It is a super-2 number, since 2×836456381² = 1399318554631234322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (836456351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418228190 + 418228191.

It is an arithmetic number, because the mean of its divisors is an integer number (418228191).

Almost surely, 2^836456381 is an apocalyptic number.

It is an amenable number.

836456381 is a deficient number, since it is larger than the sum of its proper divisors (1).

836456381 is an equidigital number, since it uses as much as digits as its factorization.

836456381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 836456381 is about 28921.5556462649. Note that the first 3 decimals coincide. The cubic root of 836456381 is about 942.2101235485.

The spelling of 836456381 in words is "eight hundred thirty-six million, four hundred fifty-six thousand, three hundred eighty-one".