64620193 has 4 divisors (see below), whose sum is σ = 70494768. Its totient is φ = 58745620.

The previous prime is 64620187. The next prime is 64620203. The reversal of 64620193 is 39102646.

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 64620193 - 2¹³ = 64612001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64620113) 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, 2937271 + ... + 2937292.

It is an arithmetic number, because the mean of its divisors is an integer number (17623692).

Almost surely, 2^64620193 is an apocalyptic number.

It is an amenable number.

64620193 is a deficient number, since it is larger than the sum of its proper divisors (5874575).

64620193 is a wasteful number, since it uses less digits than its factorization.

64620193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5874574.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 64620193 is about 8038.6686086690. The cubic root of 64620193 is about 401.2879174708.

The spelling of 64620193 in words is "sixty-four million, six hundred twenty thousand, one hundred ninety-three".