61274929 has 4 divisors (see below), whose sum is σ = 61303284. Its totient is φ = 61246576.

The previous prime is 61274903. The next prime is 61274963. The reversal of 61274929 is 92947216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8567329 + 52707600 = 2927^2 + 7260^2 .

It is a cyclic number.

It is not a de Polignac number, because 61274929 - 2⁵ = 61274897 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61274891 and 61274900.

It is not an unprimeable number, because it can be changed into a prime (61274989) 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, 10642 + ... + 15355.

It is an arithmetic number, because the mean of its divisors is an integer number (15325821).

Almost surely, 2^61274929 is an apocalyptic number.

It is an amenable number.

61274929 is a deficient number, since it is larger than the sum of its proper divisors (28355).

61274929 is a wasteful number, since it uses less digits than its factorization.

61274929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28354.

The product of its digits is 54432, while the sum is 40.

The square root of 61274929 is about 7827.8304146168. The cubic root of 61274929 is about 394.2402294414.

The spelling of 61274929 in words is "sixty-one million, two hundred seventy-four thousand, nine hundred twenty-nine".