429890581 has 4 divisors (see below), whose sum is σ = 429938464. Its totient is φ = 429842700.

The previous prime is 429890569. The next prime is 429890597. The reversal of 429890581 is 185098924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(429890581) divides (429890581-1)³.

It is a cyclic number.

It is not a de Polignac number, because 429890581 - 2¹³ = 429882389 is a prime.

It is a super-2 number, since 2×429890581² = 369611823265035122, which contains 22 as substring.

It is a deceptive number, since it divides R_429890580.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (429890521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5985 + ... + 29926.

It is an arithmetic number, because the mean of its divisors is an integer number (107484616).

Almost surely, 2^429890581 is an apocalyptic number.

429890581 is the 11971-st octagonal number.

It is an amenable number.

429890581 is a deficient number, since it is larger than the sum of its proper divisors (47883).

429890581 is a wasteful number, since it uses less digits than its factorization.

429890581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47882.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 429890581 is about 20733.8028590994. The cubic root of 429890581 is about 754.7202044970.

The spelling of 429890581 in words is "four hundred twenty-nine million, eight hundred ninety thousand, five hundred eighty-one".