30661901 has 4 divisors (see below), whose sum is σ = 30684732. Its totient is φ = 30639072.

The previous prime is 30661889. The next prime is 30661913. The reversal of 30661901 is 10916603.

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

It is an interprime number because it is at equal distance from previous prime (30661889) and next prime (30661913).

It can be written as a sum of positive squares in 2 ways, for example, as 28408900 + 2253001 = 5330^2 + 1501^2 .

It is a cyclic number.

It is not a de Polignac number, because 30661901 - 2⁶ = 30661837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30661601) 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, 9266 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (7671183).

Almost surely, 2^30661901 is an apocalyptic number.

It is an amenable number.

30661901 is a deficient number, since it is larger than the sum of its proper divisors (22831).

30661901 is a wasteful number, since it uses less digits than its factorization.

30661901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22830.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 30661901 is about 5537.3189360917. The cubic root of 30661901 is about 312.9918475490.

The spelling of 30661901 in words is "thirty million, six hundred sixty-one thousand, nine hundred one".