61818707 has 2 divisors, whose sum is σ = 61818708. Its totient is φ = 61818706.

The previous prime is 61818697. The next prime is 61818709. The reversal of 61818707 is 70781816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61818707 - 2⁸ = 61818451 is a prime.

Together with 61818709, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (61818709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30909353 + 30909354.

It is an arithmetic number, because the mean of its divisors is an integer number (30909354).

Almost surely, 2^61818707 is an apocalyptic number.

61818707 is a deficient number, since it is larger than the sum of its proper divisors (1).

61818707 is an equidigital number, since it uses as much as digits as its factorization.

61818707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 61818707 is about 7862.4873290836. The cubic root of 61818707 is about 395.4030112037.

The spelling of 61818707 in words is "sixty-one million, eight hundred eighteen thousand, seven hundred seven".