429661381 has 2 divisors, whose sum is σ = 429661382. Its totient is φ = 429661380.

The previous prime is 429661343. The next prime is 429661409. The reversal of 429661381 is 183166924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377330625 + 52330756 = 19425^2 + 7234^2 .

It is a cyclic number.

It is not a de Polignac number, because 429661381 - 2¹¹ = 429659333 is a prime.

It is a super-2 number, since 2×429661381² = 369217804645654322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (429661481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214830690 + 214830691.

It is an arithmetic number, because the mean of its divisors is an integer number (214830691).

Almost surely, 2^429661381 is an apocalyptic number.

It is an amenable number.

429661381 is a deficient number, since it is larger than the sum of its proper divisors (1).

429661381 is an equidigital number, since it uses as much as digits as its factorization.

429661381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 429661381 is about 20728.2749161622. The cubic root of 429661381 is about 754.5860520484.

The spelling of 429661381 in words is "four hundred twenty-nine million, six hundred sixty-one thousand, three hundred eighty-one".