61404047 has 2 divisors, whose sum is σ = 61404048. Its totient is φ = 61404046.

The previous prime is 61404011. The next prime is 61404059. The reversal of 61404047 is 74040416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61404047 - 2⁸ = 61403791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61404097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30702023 + 30702024.

It is an arithmetic number, because the mean of its divisors is an integer number (30702024).

Almost surely, 2^61404047 is an apocalyptic number.

61404047 is a deficient number, since it is larger than the sum of its proper divisors (1).

61404047 is an equidigital number, since it uses as much as digits as its factorization.

61404047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 61404047 is about 7836.0734427390. The cubic root of 61404047 is about 394.5169483654.

The spelling of 61404047 in words is "sixty-one million, four hundred four thousand, forty-seven".