1964147 has 4 divisors (see below), whose sum is σ = 1983696. Its totient is φ = 1944600.

The previous prime is 1964143. The next prime is 1964159. The reversal of 1964147 is 7414691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7414691 = 29 ⋅255679.

It is a cyclic number.

It is not a de Polignac number, because 1964147 - 2² = 1964143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964143) 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, 9623 + ... + 9824.

It is an arithmetic number, because the mean of its divisors is an integer number (495924).

2^1964147 is an apocalyptic number.

1964147 is a deficient number, since it is larger than the sum of its proper divisors (19549).

1964147 is a wasteful number, since it uses less digits than its factorization.

1964147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19548.

The product of its digits is 6048, while the sum is 32.

The square root of 1964147 is about 1401.4802888375. The cubic root of 1964147 is about 125.2346950700.

The spelling of 1964147 in words is "one million, nine hundred sixty-four thousand, one hundred forty-seven".