29891489 has 4 divisors (see below), whose sum is σ = 30922260. Its totient is φ = 28860720.

The previous prime is 29891473. The next prime is 29891531. The reversal of 29891489 is 98419892.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19651489 + 10240000 = 4433^2 + 3200^2 .

It is a cyclic number.

It is not a de Polignac number, because 29891489 - 2⁴ = 29891473 is a prime.

It is a super-2 number, since 2×29891489² = 1787002229274242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (29891089) 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 in 3 ways as a sum of consecutive naturals, for example, 515342 + ... + 515399.

It is an arithmetic number, because the mean of its divisors is an integer number (7730565).

Almost surely, 2^29891489 is an apocalyptic number.

29891489 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

29891489 is a deficient number, since it is larger than the sum of its proper divisors (1030771).

29891489 is a wasteful number, since it uses less digits than its factorization.

29891489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030770.

The product of its digits is 373248, while the sum is 50.

The square root of 29891489 is about 5467.3109478061. The cubic root of 29891489 is about 310.3481658816.

The spelling of 29891489 in words is "twenty-nine million, eight hundred ninety-one thousand, four hundred eighty-nine".