61007900 has 54 divisors (see below), whose sum is σ = 140699328. Its totient is φ = 22956800.

The previous prime is 61007899. The next prime is 61007911. The reversal of 61007900 is 970016.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27845 + ... + 29955.

Almost surely, 2^61007900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61007900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70349664).

61007900 is an abundant number, since it is smaller than the sum of its proper divisors (79691428).

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

61007900 is a wasteful number, since it uses less digits than its factorization.

61007900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2135 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 61007900 is about 7810.7554052089. The cubic root of 61007900 is about 393.6667111984. Note that the first 3 decimals are identical.

Adding to 61007900 its reverse (970016), we get a palindrome (61977916).

The spelling of 61007900 in words is "sixty-one million, seven thousand, nine hundred".