61047731 has 8 divisors (see below), whose sum is σ = 64707984. Its totient is φ = 57395200.

The previous prime is 61047719. The next prime is 61047737. The reversal of 61047731 is 13774016.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61047731 is a prime.

It is a super-2 number, since 2×61047731² = 7453650920496722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61047694 and 61047703.

It is not an unprimeable number, because it can be changed into a prime (61047737) 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, 26096 + ... + 28338.

It is an arithmetic number, because the mean of its divisors is an integer number (8088498).

Almost surely, 2^61047731 is an apocalyptic number.

61047731 is a deficient number, since it is larger than the sum of its proper divisors (3660253).

61047731 is a wasteful number, since it uses less digits than its factorization.

61047731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 61047731 is about 7813.3047425529. The cubic root of 61047731 is about 393.7523652835.

The spelling of 61047731 in words is "sixty-one million, forty-seven thousand, seven hundred thirty-one".