641354001 has 4 divisors (see below), whose sum is σ = 855138672. Its totient is φ = 427569332.

The previous prime is 641353997. The next prime is 641354003. The reversal of 641354001 is 100453146.

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 641354001 - 2² = 641353997 is a prime.

It is a super-2 number, since 2×641354001² = 822669909197416002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (641354003) 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, 106892331 + ... + 106892336.

It is an arithmetic number, because the mean of its divisors is an integer number (213784668).

Almost surely, 2^641354001 is an apocalyptic number.

It is an amenable number.

641354001 is a deficient number, since it is larger than the sum of its proper divisors (213784671).

641354001 is a wasteful number, since it uses less digits than its factorization.

641354001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213784670.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 641354001 is about 25324.9679368010. The cubic root of 641354001 is about 862.3811785064.

The spelling of 641354001 in words is "six hundred forty-one million, three hundred fifty-four thousand, one".