61738979 has 2 divisors, whose sum is σ = 61738980. Its totient is φ = 61738978.

The previous prime is 61738967. The next prime is 61739003. The reversal of 61738979 is 97983716.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61738979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61738879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30869489 + 30869490.

It is an arithmetic number, because the mean of its divisors is an integer number (30869490).

Almost surely, 2^61738979 is an apocalyptic number.

61738979 is a deficient number, since it is larger than the sum of its proper divisors (1).

61738979 is an equidigital number, since it uses as much as digits as its factorization.

61738979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 61738979 is about 7857.4155420214. The cubic root of 61738979 is about 395.2329534382.

The spelling of 61738979 in words is "sixty-one million, seven hundred thirty-eight thousand, nine hundred seventy-nine".