61899102 has 24 divisors (see below), whose sum is σ = 137235384. Its totient is φ = 20152944.

The previous prime is 61899073. The next prime is 61899121. The reversal of 61899102 is 20199816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39213 + ... + 40760.

It is an arithmetic number, because the mean of its divisors is an integer number (5718141).

Almost surely, 2^61899102 is an apocalyptic number.

61899102 is an abundant number, since it is smaller than the sum of its proper divisors (75336282).

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

61899102 is a wasteful number, since it uses less digits than its factorization.

61899102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80024 (or 80021 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 61899102 is about 7867.5982358023. The cubic root of 61899102 is about 395.5743436710.

It can be divided in two parts, 61899 and 102, that added together give a square (62001 = 249²).

The spelling of 61899102 in words is "sixty-one million, eight hundred ninety-nine thousand, one hundred two".