61404311 has 2 divisors, whose sum is σ = 61404312. Its totient is φ = 61404310.

The previous prime is 61404307. The next prime is 61404331. The reversal of 61404311 is 11340416.

It is an a-pointer prime, because the next prime (61404331) can be obtained adding 61404311 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61404311 - 2² = 61404307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61404331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30702155 + 30702156.

It is an arithmetic number, because the mean of its divisors is an integer number (30702156).

Almost surely, 2^61404311 is an apocalyptic number.

61404311 is a deficient number, since it is larger than the sum of its proper divisors (1).

61404311 is an equidigital number, since it uses as much as digits as its factorization.

61404311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 61404311 is about 7836.0902878923. The cubic root of 61404311 is about 394.5175137588.

Adding to 61404311 its reverse (11340416), we get a palindrome (72744727).

The spelling of 61404311 in words is "sixty-one million, four hundred four thousand, three hundred eleven".