61604453 has 4 divisors (see below), whose sum is σ = 62074848. Its totient is φ = 61134060.

The previous prime is 61604407. The next prime is 61604467. The reversal of 61604453 is 35440616.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 61604453 - 2¹⁰ = 61603429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61604483) 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, 235001 + ... + 235262.

It is an arithmetic number, because the mean of its divisors is an integer number (15518712).

Almost surely, 2^61604453 is an apocalyptic number.

It is an amenable number.

61604453 is a deficient number, since it is larger than the sum of its proper divisors (470395).

61604453 is a wasteful number, since it uses less digits than its factorization.

61604453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470394.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 61604453 is about 7848.8504253808. The cubic root of 61604453 is about 394.9456807215.

The spelling of 61604453 in words is "sixty-one million, six hundred four thousand, four hundred fifty-three".