61499687 has 2 divisors, whose sum is σ = 61499688. Its totient is φ = 61499686.

The previous prime is 61499681. The next prime is 61499689. The reversal of 61499687 is 78699416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61499687 - 2⁴ = 61499671 is a prime.

Together with 61499689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61499681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30749843 + 30749844.

It is an arithmetic number, because the mean of its divisors is an integer number (30749844).

Almost surely, 2^61499687 is an apocalyptic number.

61499687 is a deficient number, since it is larger than the sum of its proper divisors (1).

61499687 is an equidigital number, since it uses as much as digits as its factorization.

61499687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 61499687 is about 7842.1736145026. The cubic root of 61499687 is about 394.7216690099.

The spelling of 61499687 in words is "sixty-one million, four hundred ninety-nine thousand, six hundred eighty-seven".