61430739 has 8 divisors (see below), whose sum is σ = 83650560. Its totient is φ = 40082376.

The previous prime is 61430711. The next prime is 61430749. The reversal of 61430739 is 93703416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61430739 - 2⁹ = 61430227 is a prime.

It is a super-2 number, since 2×61430739² = 7547471388172242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61430749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217699 + ... + 217980.

It is an arithmetic number, because the mean of its divisors is an integer number (10456320).

Almost surely, 2^61430739 is an apocalyptic number.

61430739 is a deficient number, since it is larger than the sum of its proper divisors (22219821).

61430739 is a wasteful number, since it uses less digits than its factorization.

61430739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435729.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 61430739 is about 7837.7764066092. The cubic root of 61430739 is about 394.5741048636.

The spelling of 61430739 in words is "sixty-one million, four hundred thirty thousand, seven hundred thirty-nine".