61139329 has 2 divisors, whose sum is σ = 61139330. Its totient is φ = 61139328.

The previous prime is 61139311. The next prime is 61139371. The reversal of 61139329 is 92393116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35129329 + 26010000 = 5927^2 + 5100^2 .

It is a cyclic number.

It is not a de Polignac number, because 61139329 - 2⁵ = 61139297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61139294 and 61139303.

It is not a weakly prime, because it can be changed into another prime (61119329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30569664 + 30569665.

It is an arithmetic number, because the mean of its divisors is an integer number (30569665).

Almost surely, 2^61139329 is an apocalyptic number.

It is an amenable number.

61139329 is a deficient number, since it is larger than the sum of its proper divisors (1).

61139329 is an equidigital number, since it uses as much as digits as its factorization.

61139329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 34.

The square root of 61139329 is about 7819.1642136484. The cubic root of 61139329 is about 393.9491998200.

The spelling of 61139329 in words is "sixty-one million, one hundred thirty-nine thousand, three hundred twenty-nine".