61400387 has 2 divisors, whose sum is σ = 61400388. Its totient is φ = 61400386.

The previous prime is 61400359. The next prime is 61400483. The reversal of 61400387 is 78300416.

61400387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61400387 - 2¹⁸ = 61138243 is a prime.

It is not a weakly prime, because it can be changed into another prime (61400327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30700193 + 30700194.

It is an arithmetic number, because the mean of its divisors is an integer number (30700194).

Almost surely, 2^61400387 is an apocalyptic number.

61400387 is a deficient number, since it is larger than the sum of its proper divisors (1).

61400387 is an equidigital number, since it uses as much as digits as its factorization.

61400387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 61400387 is about 7835.8399039286. The cubic root of 61400387 is about 394.5091097902.

Adding to 61400387 its sum of digits (29), we get a palindrome (61400416).

The spelling of 61400387 in words is "sixty-one million, four hundred thousand, three hundred eighty-seven".