61230739 has 2 divisors, whose sum is σ = 61230740. Its totient is φ = 61230738.

The previous prime is 61230737. The next prime is 61230773. The reversal of 61230739 is 93703216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61230739 - 2¹ = 61230737 is a prime.

It is a super-2 number, since 2×61230739² = 7498406796972242, which contains 22 as substring.

Together with 61230737, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 61230739.

It is not a weakly prime, because it can be changed into another prime (61230737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30615369 + 30615370.

It is an arithmetic number, because the mean of its divisors is an integer number (30615370).

Almost surely, 2^61230739 is an apocalyptic number.

61230739 is a deficient number, since it is larger than the sum of its proper divisors (1).

61230739 is an equidigital number, since it uses as much as digits as its factorization.

61230739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 61230739 is about 7825.0072843417. The cubic root of 61230739 is about 394.1454344701.

The spelling of 61230739 in words is "sixty-one million, two hundred thirty thousand, seven hundred thirty-nine".