61878087 has 10 divisors (see below), whose sum is σ = 92435288. Its totient is φ = 41252004.

The previous prime is 61878067. The next prime is 61878109. The reversal of 61878087 is 78087816.

It is not a de Polignac number, because 61878087 - 2¹² = 61873991 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 (61878017) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 381883 + ... + 382044.

Almost surely, 2^61878087 is an apocalyptic number.

61878087 is a deficient number, since it is larger than the sum of its proper divisors (30557201).

61878087 is an equidigital number, since it uses as much as digits as its factorization.

61878087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763939 (or 763930 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 61878087 is about 7866.2625814296. The cubic root of 61878087 is about 395.5295722311.

The spelling of 61878087 in words is "sixty-one million, eight hundred seventy-eight thousand, eighty-seven".