61931814 has 32 divisors (see below), whose sum is σ = 142891776. Its totient is φ = 17528160.

The previous prime is 61931789. The next prime is 61931819. The reversal of 61931814 is 41813916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61931819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2397 + ... + 11384.

It is an arithmetic number, because the mean of its divisors is an integer number (4465368).

Almost surely, 2^61931814 is an apocalyptic number.

61931814 is an abundant number, since it is smaller than the sum of its proper divisors (80959962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61931814 is a wasteful number, since it uses less digits than its factorization.

61931814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13900.

The product of its digits is 5184, while the sum is 33.

The square root of 61931814 is about 7869.6768675721. The cubic root of 61931814 is about 395.6440148439.

The spelling of 61931814 in words is "sixty-one million, nine hundred thirty-one thousand, eight hundred fourteen".