61415903 has 4 divisors (see below), whose sum is σ = 61432008. Its totient is φ = 61399800.

The previous prime is 61415843. The next prime is 61415947. The reversal of 61415903 is 30951416.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61415903 - 2¹² = 61411807 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 (61415603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253 + ... + 11153.

It is an arithmetic number, because the mean of its divisors is an integer number (15358002).

Almost surely, 2^61415903 is an apocalyptic number.

61415903 is a deficient number, since it is larger than the sum of its proper divisors (16105).

61415903 is an equidigital number, since it uses as much as digits as its factorization.

61415903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16104.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 61415903 is about 7836.8299075583. The cubic root of 61415903 is about 394.5423380705.

The spelling of 61415903 in words is "sixty-one million, four hundred fifteen thousand, nine hundred three".