5405657 has 4 divisors (see below), whose sum is σ = 5415696. Its totient is φ = 5395620.

The previous prime is 5405641. The next prime is 5405669. The reversal of 5405657 is 7565045.

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 5405657 - 2⁴ = 5405641 is a prime.

It is a super-2 number, since 2×5405657² = 58442255203298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5405357) 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, 4163 + ... + 5304.

It is an arithmetic number, because the mean of its divisors is an integer number (1353924).

Almost surely, 2^5405657 is an apocalyptic number.

It is an amenable number.

5405657 is a deficient number, since it is larger than the sum of its proper divisors (10039).

5405657 is an equidigital number, since it uses as much as digits as its factorization.

5405657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10038.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 5405657 is about 2325.0068817102. The cubic root of 5405657 is about 175.5023064986.

Subtracting from 5405657 its sum of digits (32), we obtain a square (5405625 = 2325²).

The spelling of 5405657 in words is "five million, four hundred five thousand, six hundred fifty-seven".