61149973 has 4 divisors (see below), whose sum is σ = 61191648. Its totient is φ = 61108300.

The previous prime is 61149971. The next prime is 61149989. The reversal of 61149973 is 37994116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61149973 - 2¹ = 61149971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61149971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18553 + ... + 21598.

It is an arithmetic number, because the mean of its divisors is an integer number (15297912).

Almost surely, 2^61149973 is an apocalyptic number.

It is an amenable number.

61149973 is a deficient number, since it is larger than the sum of its proper divisors (41675).

61149973 is a wasteful number, since it uses less digits than its factorization.

61149973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41674.

The product of its digits is 40824, while the sum is 40.

The square root of 61149973 is about 7819.8448194322. The cubic root of 61149973 is about 393.9720599116.

It can be divided in two parts, 611 and 49973, that multiplied together give a palindrome (30533503).

The spelling of 61149973 in words is "sixty-one million, one hundred forty-nine thousand, nine hundred seventy-three".