61478399 has 2 divisors, whose sum is σ = 61478400. Its totient is φ = 61478398.

The previous prime is 61478371. The next prime is 61478411. The reversal of 61478399 is 99387416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61478399 - 2⁸ = 61478143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61478359) 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, 30739199 + 30739200.

It is an arithmetic number, because the mean of its divisors is an integer number (30739200).

Almost surely, 2^61478399 is an apocalyptic number.

61478399 is a deficient number, since it is larger than the sum of its proper divisors (1).

61478399 is an equidigital number, since it uses as much as digits as its factorization.

61478399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 61478399 is about 7840.8162202669. The cubic root of 61478399 is about 394.6761197016.

The spelling of 61478399 in words is "sixty-one million, four hundred seventy-eight thousand, three hundred ninety-nine".