61400771 has 2 divisors, whose sum is σ = 61400772. Its totient is φ = 61400770.

The previous prime is 61400767. The next prime is 61400783. The reversal of 61400771 is 17700416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61400771 - 2² = 61400767 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61400771.

It is not a weakly prime, because it can be changed into another prime (61400071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30700385 + 30700386.

It is an arithmetic number, because the mean of its divisors is an integer number (30700386).

Almost surely, 2^61400771 is an apocalyptic number.

61400771 is a deficient number, since it is larger than the sum of its proper divisors (1).

61400771 is an equidigital number, since it uses as much as digits as its factorization.

61400771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 61400771 is about 7835.8644066880. The cubic root of 61400771 is about 394.5099322127.

The spelling of 61400771 in words is "sixty-one million, four hundred thousand, seven hundred seventy-one".