30861001 has 4 divisors (see below), whose sum is σ = 32676372. Its totient is φ = 29045632.

The previous prime is 30860993. The next prime is 30861007. The reversal of 30861001 is 10016803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8761600 + 22099401 = 2960^2 + 4701^2 .

It is a cyclic number.

It is not a de Polignac number, because 30861001 - 2³ = 30860993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30861001.

It is not an unprimeable number, because it can be changed into a prime (30861007) 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, 907660 + ... + 907693.

It is an arithmetic number, because the mean of its divisors is an integer number (8169093).

Almost surely, 2^30861001 is an apocalyptic number.

It is an amenable number.

30861001 is a deficient number, since it is larger than the sum of its proper divisors (1815371).

30861001 is a wasteful number, since it uses less digits than its factorization.

30861001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815370.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 30861001 is about 5555.2678603286. The cubic root of 30861001 is about 313.6678469373.

Adding to 30861001 its reverse (10016803), we get a palindrome (40877804).

The spelling of 30861001 in words is "thirty million, eight hundred sixty-one thousand, one".