61408787 has 4 divisors (see below), whose sum is σ = 66991416. Its totient is φ = 55826160.

The previous prime is 61408769. The next prime is 61408801. The reversal of 61408787 is 78780416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61408787 - 2⁶ = 61408723 is a prime.

It is a super-2 number, since 2×61408787² = 7542078241622738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61408717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2791298 + ... + 2791319.

It is an arithmetic number, because the mean of its divisors is an integer number (16747854).

Almost surely, 2^61408787 is an apocalyptic number.

61408787 is a deficient number, since it is larger than the sum of its proper divisors (5582629).

61408787 is a wasteful number, since it uses less digits than its factorization.

61408787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5582628.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 61408787 is about 7836.3758842975. The cubic root of 61408787 is about 394.5270994999.

The spelling of 61408787 in words is "sixty-one million, four hundred eight thousand, seven hundred eighty-seven".