1653420057 has 4 divisors (see below), whose sum is σ = 2204560080. Its totient is φ = 1102280036.

The previous prime is 1653420049. The next prime is 1653420101. The reversal of 1653420057 is 7500243561.

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 an emirpimes, since its reverse is a distinct semiprime: 7500243561 = 3 ⋅2500081187.

It is a cyclic number.

It is not a de Polignac number, because 1653420057 - 2³ = 1653420049 is a prime.

It is a super-3 number, since 3×1653420057³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1653420157) 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, 275570007 + ... + 275570012.

It is an arithmetic number, because the mean of its divisors is an integer number (551140020).

Almost surely, 2^1653420057 is an apocalyptic number.

It is an amenable number.

1653420057 is a deficient number, since it is larger than the sum of its proper divisors (551140023).

1653420057 is an equidigital number, since it uses as much as digits as its factorization.

1653420057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551140022.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 1653420057 is about 40662.2682225180. The cubic root of 1653420057 is about 1182.4816242394.

The spelling of 1653420057 in words is "one billion, six hundred fifty-three million, four hundred twenty thousand, fifty-seven".