61818007 has 2 divisors, whose sum is σ = 61818008. Its totient is φ = 61818006.

The previous prime is 61817993. The next prime is 61818011. The reversal of 61818007 is 70081816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61818007 - 2¹⁵ = 61785239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61818007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61818707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30909003 + 30909004.

It is an arithmetic number, because the mean of its divisors is an integer number (30909004).

Almost surely, 2^61818007 is an apocalyptic number.

61818007 is a deficient number, since it is larger than the sum of its proper divisors (1).

61818007 is an equidigital number, since it uses as much as digits as its factorization.

61818007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 61818007 is about 7862.4428137825. The cubic root of 61818007 is about 395.4015187582.

The spelling of 61818007 in words is "sixty-one million, eight hundred eighteen thousand, seven".