641092147 has 4 divisors (see below), whose sum is σ = 647439696. Its totient is φ = 634744600.

The previous prime is 641092139. The next prime is 641092159. The reversal of 641092147 is 741290146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741290146 = 2 ⋅370645073.

It is not a de Polignac number, because 641092147 - 2³ = 641092139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641092447) 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, 3173623 + ... + 3173824.

It is an arithmetic number, because the mean of its divisors is an integer number (161859924).

Almost surely, 2^641092147 is an apocalyptic number.

641092147 is a deficient number, since it is larger than the sum of its proper divisors (6347549).

641092147 is a wasteful number, since it uses less digits than its factorization.

641092147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6347548.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 641092147 is about 25319.7975307861. The cubic root of 641092147 is about 862.2637973096.

The spelling of 641092147 in words is "six hundred forty-one million, ninety-two thousand, one hundred forty-seven".