53433409 has 4 divisors (see below), whose sum is σ = 54339120. Its totient is φ = 52527700.

The previous prime is 53433403. The next prime is 53433427. The reversal of 53433409 is 90433435.

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.

It is not a de Polignac number, because 53433409 - 2¹⁹ = 52909121 is a prime.

It is a super-2 number, since 2×53433409² = 5710258394722562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53433403) 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, 452767 + ... + 452884.

It is an arithmetic number, because the mean of its divisors is an integer number (13584780).

Almost surely, 2^53433409 is an apocalyptic number.

53433409 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

53433409 is a deficient number, since it is larger than the sum of its proper divisors (905711).

53433409 is an equidigital number, since it uses as much as digits as its factorization.

53433409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905710.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 53433409 is about 7309.8159347551. The cubic root of 53433409 is about 376.6497014661.

The spelling of 53433409 in words is "fifty-three million, four hundred thirty-three thousand, four hundred nine".