61420207 has 4 divisors (see below), whose sum is σ = 63401536. Its totient is φ = 59438880.

The previous prime is 61420199. The next prime is 61420213. The reversal of 61420207 is 70202416.

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

It is a cyclic number.

It is not a de Polignac number, because 61420207 - 2³ = 61420199 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 (61420237) 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, 990618 + ... + 990679.

It is an arithmetic number, because the mean of its divisors is an integer number (15850384).

Almost surely, 2^61420207 is an apocalyptic number.

61420207 is a deficient number, since it is larger than the sum of its proper divisors (1981329).

61420207 is a wasteful number, since it uses less digits than its factorization.

61420207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981328.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 61420207 is about 7837.1045035778. The cubic root of 61420207 is about 394.5515543075.

The spelling of 61420207 in words is "sixty-one million, four hundred twenty thousand, two hundred seven".