61147903 has 8 divisors (see below), whose sum is σ = 63543296. Its totient is φ = 58779000.

The previous prime is 61147901. The next prime is 61147913. The reversal of 61147903 is 30974116.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61147903 - 2¹ = 61147901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61147901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851 + ... + 11212.

It is an arithmetic number, because the mean of its divisors is an integer number (7942912).

Almost surely, 2^61147903 is an apocalyptic number.

61147903 is a deficient number, since it is larger than the sum of its proper divisors (2395393).

61147903 is a wasteful number, since it uses less digits than its factorization.

61147903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 61147903 is about 7819.7124627444. The cubic root of 61147903 is about 393.9676143857.

The spelling of 61147903 in words is "sixty-one million, one hundred forty-seven thousand, nine hundred three".