61701631 has 2 divisors, whose sum is σ = 61701632. Its totient is φ = 61701630.

The previous prime is 61701613. The next prime is 61701659. The reversal of 61701631 is 13610716.

It is a happy number.

Together with previous prime (61701613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61701631 - 2⁵ = 61701599 is a prime.

It is a super-2 number, since 2×61701631² = 7614182536120322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61701596 and 61701605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61701931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30850815 + 30850816.

It is an arithmetic number, because the mean of its divisors is an integer number (30850816).

Almost surely, 2^61701631 is an apocalyptic number.

61701631 is a deficient number, since it is larger than the sum of its proper divisors (1).

61701631 is an equidigital number, since it uses as much as digits as its factorization.

61701631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 61701631 is about 7855.0385740619. The cubic root of 61701631 is about 395.1532407613.

The spelling of 61701631 in words is "sixty-one million, seven hundred one thousand, six hundred thirty-one".