61945953 has 16 divisors (see below), whose sum is σ = 84623616. Its totient is φ = 40288640.

The previous prime is 61945931. The next prime is 61945979. The reversal of 61945953 is 35954916.

It is a cyclic number.

It is not a de Polignac number, because 61945953 - 2²⁰ = 60897377 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61945903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64525 + ... + 65477.

It is an arithmetic number, because the mean of its divisors is an integer number (5288976).

Almost surely, 2^61945953 is an apocalyptic number.

It is an amenable number.

61945953 is a deficient number, since it is larger than the sum of its proper divisors (22677663).

61945953 is a wasteful number, since it uses less digits than its factorization.

61945953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464.

The product of its digits is 145800, while the sum is 42.

The square root of 61945953 is about 7870.5751378155. The cubic root of 61945953 is about 395.6741209919.

The spelling of 61945953 in words is "sixty-one million, nine hundred forty-five thousand, nine hundred fifty-three".