61371731 has 2 divisors, whose sum is σ = 61371732. Its totient is φ = 61371730.

The previous prime is 61371719. The next prime is 61371773. The reversal of 61371731 is 13717316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61371731 - 2¹⁰ = 61370707 is a prime.

It is a super-2 number, since 2×61371731² = 7532978731872722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61371694 and 61371703.

It is not a weakly prime, because it can be changed into another prime (61371701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30685865 + 30685866.

It is an arithmetic number, because the mean of its divisors is an integer number (30685866).

Almost surely, 2^61371731 is an apocalyptic number.

61371731 is a deficient number, since it is larger than the sum of its proper divisors (1).

61371731 is an equidigital number, since it uses as much as digits as its factorization.

61371731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 29.

The square root of 61371731 is about 7834.0111692542. The cubic root of 61371731 is about 394.4477268317.

The spelling of 61371731 in words is "sixty-one million, three hundred seventy-one thousand, seven hundred thirty-one".