61397159 has 2 divisors, whose sum is σ = 61397160. Its totient is φ = 61397158.

The previous prime is 61397137. The next prime is 61397177. The reversal of 61397159 is 95179316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61397159 - 2¹⁶ = 61331623 is a prime.

It is a super-2 number, since 2×61397159² = 7539222266542562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61397129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30698579 + 30698580.

It is an arithmetic number, because the mean of its divisors is an integer number (30698580).

Almost surely, 2^61397159 is an apocalyptic number.

61397159 is a deficient number, since it is larger than the sum of its proper divisors (1).

61397159 is an equidigital number, since it uses as much as digits as its factorization.

61397159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51030, while the sum is 41.

The square root of 61397159 is about 7835.6339245782. The cubic root of 61397159 is about 394.5021961654.

The spelling of 61397159 in words is "sixty-one million, three hundred ninety-seven thousand, one hundred fifty-nine".