61274747 has 2 divisors, whose sum is σ = 61274748. Its totient is φ = 61274746.

The previous prime is 61274729. The next prime is 61274761. The reversal of 61274747 is 74747216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61274747 - 2¹⁸ = 61012603 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61274747.

It is not a weakly prime, because it can be changed into another prime (61274777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30637373 + 30637374.

It is an arithmetic number, because the mean of its divisors is an integer number (30637374).

Almost surely, 2^61274747 is an apocalyptic number.

61274747 is a deficient number, since it is larger than the sum of its proper divisors (1).

61274747 is an equidigital number, since it uses as much as digits as its factorization.

61274747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 38.

The square root of 61274747 is about 7827.8187894202. The cubic root of 61274747 is about 394.2398391143.

The spelling of 61274747 in words is "sixty-one million, two hundred seventy-four thousand, seven hundred forty-seven".