61563379 has 2 divisors, whose sum is σ = 61563380. Its totient is φ = 61563378.

The previous prime is 61563367. The next prime is 61563421. The reversal of 61563379 is 97336516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61563379 - 2¹³ = 61555187 is a prime.

It is not a weakly prime, because it can be changed into another prime (61563979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30781689 + 30781690.

It is an arithmetic number, because the mean of its divisors is an integer number (30781690).

Almost surely, 2^61563379 is an apocalyptic number.

61563379 is a deficient number, since it is larger than the sum of its proper divisors (1).

61563379 is an equidigital number, since it uses as much as digits as its factorization.

61563379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 61563379 is about 7846.2334275753. The cubic root of 61563379 is about 394.8578861725.

The spelling of 61563379 in words is "sixty-one million, five hundred sixty-three thousand, three hundred seventy-nine".