61400123 has 2 divisors, whose sum is σ = 61400124. Its totient is φ = 61400122.

The previous prime is 61400113. The next prime is 61400137. The reversal of 61400123 is 32100416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61400123 - 2¹⁶ = 61334587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61400113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30700061 + 30700062.

It is an arithmetic number, because the mean of its divisors is an integer number (30700062).

Almost surely, 2^61400123 is an apocalyptic number.

61400123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61400123 is an equidigital number, since it uses as much as digits as its factorization.

61400123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 61400123 is about 7835.8230582371. The cubic root of 61400123 is about 394.5085443727.

Adding to 61400123 its reverse (32100416), we get a palindrome (93500539).

The spelling of 61400123 in words is "sixty-one million, four hundred thousand, one hundred twenty-three".