649547401 has 4 divisors (see below), whose sum is σ = 657769600. Its totient is φ = 641325204.

The previous prime is 649547389. The next prime is 649547413. The reversal of 649547401 is 104745946.

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: 104745946 = 2 ⋅52372973.

It is an interprime number because it is at equal distance from previous prime (649547389) and next prime (649547413).

It is a cyclic number.

It is not a de Polignac number, because 649547401 - 2⁵ = 649547369 is a prime.

It is a super-2 number, since 2×649547401² = 843823652291709602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649547501) 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, 4110981 + ... + 4111138.

It is an arithmetic number, because the mean of its divisors is an integer number (164442400).

Almost surely, 2^649547401 is an apocalyptic number.

It is an amenable number.

649547401 is a deficient number, since it is larger than the sum of its proper divisors (8222199).

649547401 is an equidigital number, since it uses as much as digits as its factorization.

649547401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8222198.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 649547401 is about 25486.2198256234. The cubic root of 649547401 is about 866.0380027841.

The spelling of 649547401 in words is "six hundred forty-nine million, five hundred forty-seven thousand, four hundred one".