61421967 has 6 divisors (see below), whose sum is σ = 88720632. Its totient is φ = 40947972.

The previous prime is 61421963. The next prime is 61421989. The reversal of 61421967 is 76912416.

It is not a de Polignac number, because 61421967 - 2² = 61421963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61421963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3412323 + ... + 3412340.

It is an arithmetic number, because the mean of its divisors is an integer number (14786772).

Almost surely, 2^61421967 is an apocalyptic number.

61421967 is a deficient number, since it is larger than the sum of its proper divisors (27298665).

61421967 is a wasteful number, since it uses less digits than its factorization.

61421967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824669 (or 6824666 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 61421967 is about 7837.2167891414. The cubic root of 61421967 is about 394.5553229049. Note that the first 3 decimals are identical.

The spelling of 61421967 in words is "sixty-one million, four hundred twenty-one thousand, nine hundred sixty-seven".