61867747 has 2 divisors, whose sum is σ = 61867748. Its totient is φ = 61867746.

The previous prime is 61867739. The next prime is 61867753. The reversal of 61867747 is 74776816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61867747 - 2³ = 61867739 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61867697 and 61867706.

It is not a weakly prime, because it can be changed into another prime (61867717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30933873 + 30933874.

It is an arithmetic number, because the mean of its divisors is an integer number (30933874).

Almost surely, 2^61867747 is an apocalyptic number.

61867747 is a deficient number, since it is larger than the sum of its proper divisors (1).

61867747 is an equidigital number, since it uses as much as digits as its factorization.

61867747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 46.

The square root of 61867747 is about 7865.6053168208. The cubic root of 61867747 is about 395.5075396409.

The spelling of 61867747 in words is "sixty-one million, eight hundred sixty-seven thousand, seven hundred forty-seven".