61463721 has 24 divisors (see below), whose sum is σ = 94947552. Its totient is φ = 34953600.

The previous prime is 61463719. The next prime is 61463749. The reversal of 61463721 is 12736416.

It is not a de Polignac number, because 61463721 - 2¹ = 61463719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61463761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185526 + ... + 185856.

It is an arithmetic number, because the mean of its divisors is an integer number (3956148).

Almost surely, 2^61463721 is an apocalyptic number.

It is an amenable number.

61463721 is a deficient number, since it is larger than the sum of its proper divisors (33483831).

61463721 is a wasteful number, since it uses less digits than its factorization.

61463721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 362 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 61463721 is about 7839.8801649005. The cubic root of 61463721 is about 394.6447074914.

The spelling of 61463721 in words is "sixty-one million, four hundred sixty-three thousand, seven hundred twenty-one".