61739497 has 2 divisors, whose sum is σ = 61739498. Its totient is φ = 61739496.

The previous prime is 61739459. The next prime is 61739501. The reversal of 61739497 is 79493716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58430736 + 3308761 = 7644^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 61739497 - 2¹¹ = 61737449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61739407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30869748 + 30869749.

It is an arithmetic number, because the mean of its divisors is an integer number (30869749).

Almost surely, 2^61739497 is an apocalyptic number.

61739497 is the 4537-th hex number.

It is an amenable number.

61739497 is a deficient number, since it is larger than the sum of its proper divisors (1).

61739497 is an equidigital number, since it uses as much as digits as its factorization.

61739497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 61739497 is about 7857.4485044447. The cubic root of 61739497 is about 395.2340587912.

The spelling of 61739497 in words is "sixty-one million, seven hundred thirty-nine thousand, four hundred ninety-seven".