30661207 has 8 divisors (see below), whose sum is σ = 31785840. Its totient is φ = 29541120.

The previous prime is 30661187. The next prime is 30661237. The reversal of 30661207 is 70216603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30661207 is a prime.

It is a super-2 number, since 2×30661207² = 1880219229393698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30661237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18732 + ... + 20302.

It is an arithmetic number, because the mean of its divisors is an integer number (3973230).

Almost surely, 2^30661207 is an apocalyptic number.

30661207 is a deficient number, since it is larger than the sum of its proper divisors (1124633).

30661207 is a wasteful number, since it uses less digits than its factorization.

30661207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 30661207 is about 5537.2562700312. The cubic root of 30661207 is about 312.9894861170.

The spelling of 30661207 in words is "thirty million, six hundred sixty-one thousand, two hundred seven".