61238731 has 8 divisors (see below), whose sum is σ = 61796160. Its totient is φ = 60684288.

The previous prime is 61238717. The next prime is 61238759. The reversal of 61238731 is 13783216.

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

It is a cyclic number.

It is not a de Polignac number, because 61238731 - 2¹¹ = 61236683 is a prime.

It is a super-2 number, since 2×61238731² = 7500364348980722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61238693 and 61238702.

It is not an unprimeable number, because it can be changed into a prime (61238531) 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, 60925 + ... + 61921.

It is an arithmetic number, because the mean of its divisors is an integer number (7724520).

Almost surely, 2^61238731 is an apocalyptic number.

61238731 is a deficient number, since it is larger than the sum of its proper divisors (557429).

61238731 is a wasteful number, since it uses less digits than its factorization.

61238731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493.

The product of its digits is 6048, while the sum is 31.

The square root of 61238731 is about 7825.5179381304. The cubic root of 61238731 is about 394.1625820299.

The spelling of 61238731 in words is "sixty-one million, two hundred thirty-eight thousand, seven hundred thirty-one".