61624279 has 2 divisors, whose sum is σ = 61624280. Its totient is φ = 61624278.

The previous prime is 61624267. The next prime is 61624309. The reversal of 61624279 is 97242616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61624279 - 2⁵ = 61624247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61624219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30812139 + 30812140.

It is an arithmetic number, because the mean of its divisors is an integer number (30812140).

Almost surely, 2^61624279 is an apocalyptic number.

61624279 is a deficient number, since it is larger than the sum of its proper divisors (1).

61624279 is an equidigital number, since it uses as much as digits as its factorization.

61624279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 61624279 is about 7850.1133112841. The cubic root of 61624279 is about 394.9880442891.

The spelling of 61624279 in words is "sixty-one million, six hundred twenty-four thousand, two hundred seventy-nine".