61481659 has 2 divisors, whose sum is σ = 61481660. Its totient is φ = 61481658.

The previous prime is 61481621. The next prime is 61481677. The reversal of 61481659 is 95618416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61481659 - 2¹⁹ = 60957371 is a prime.

It is not a weakly prime, because it can be changed into another prime (61481689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30740829 + 30740830.

It is an arithmetic number, because the mean of its divisors is an integer number (30740830).

Almost surely, 2^61481659 is an apocalyptic number.

61481659 is a deficient number, since it is larger than the sum of its proper divisors (1).

61481659 is an equidigital number, since it uses as much as digits as its factorization.

61481659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 61481659 is about 7841.0241040313. The cubic root of 61481659 is about 394.6830957096.

The spelling of 61481659 in words is "sixty-one million, four hundred eighty-one thousand, six hundred fifty-nine".