633701381 has 2 divisors, whose sum is σ = 633701382. Its totient is φ = 633701380.

The previous prime is 633701353. The next prime is 633701389. The reversal of 633701381 is 183107336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607178881 + 26522500 = 24641^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 633701381 - 2¹⁸ = 633439237 is a prime.

It is a super-2 number, since 2×633701381² = 803154880562614322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (633701389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316850690 + 316850691.

It is an arithmetic number, because the mean of its divisors is an integer number (316850691).

Almost surely, 2^633701381 is an apocalyptic number.

It is an amenable number.

633701381 is a deficient number, since it is larger than the sum of its proper divisors (1).

633701381 is an equidigital number, since it uses as much as digits as its factorization.

633701381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 633701381 is about 25173.4260878411. The cubic root of 633701381 is about 858.9374749794.

The spelling of 633701381 in words is "six hundred thirty-three million, seven hundred one thousand, three hundred eighty-one".