61351687 has 4 divisors (see below), whose sum is σ = 62509320. Its totient is φ = 60194056.

The previous prime is 61351673. The next prime is 61351711. The reversal of 61351687 is 78615316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61351687 - 2¹⁵ = 61318919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61351607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578737 + ... + 578842.

It is an arithmetic number, because the mean of its divisors is an integer number (15627330).

Almost surely, 2^61351687 is an apocalyptic number.

61351687 is a deficient number, since it is larger than the sum of its proper divisors (1157633).

61351687 is a wasteful number, since it uses less digits than its factorization.

61351687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157632.

The product of its digits is 30240, while the sum is 37.

The square root of 61351687 is about 7832.7317712277. The cubic root of 61351687 is about 394.4047799624.

The spelling of 61351687 in words is "sixty-one million, three hundred fifty-one thousand, six hundred eighty-seven".