1994135201 has 4 divisors (see below), whose sum is σ = 2026826004. Its totient is φ = 1961444400.

The previous prime is 1994135183. The next prime is 1994135203. The reversal of 1994135201 is 1025314991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1025314991 = 3769 ⋅272039.

It can be written as a sum of positive squares in 2 ways, for example, as 267649600 + 1726485601 = 16360^2 + 41551^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994135201 - 2¹⁴ = 1994118817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1994135203) 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, 16345310 + ... + 16345431.

It is an arithmetic number, because the mean of its divisors is an integer number (506706501).

Almost surely, 2^1994135201 is an apocalyptic number.

It is an amenable number.

1994135201 is a deficient number, since it is larger than the sum of its proper divisors (32690803).

1994135201 is an equidigital number, since it uses as much as digits as its factorization.

1994135201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32690802.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1994135201 is about 44655.7409635088. The cubic root of 1994135201 is about 1258.6883135311.

The spelling of 1994135201 in words is "one billion, nine hundred ninety-four million, one hundred thirty-five thousand, two hundred one".