61272903 has 4 divisors (see below), whose sum is σ = 81697208. Its totient is φ = 40848600.

The previous prime is 61272899. The next prime is 61272917. The reversal of 61272903 is 30927216.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61272903 - 2² = 61272899 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61272973) 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, 10212148 + ... + 10212153.

It is an arithmetic number, because the mean of its divisors is an integer number (20424302).

Almost surely, 2^61272903 is an apocalyptic number.

61272903 is a deficient number, since it is larger than the sum of its proper divisors (20424305).

61272903 is a wasteful number, since it uses less digits than its factorization.

61272903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20424304.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 61272903 is about 7827.7010034876. The cubic root of 61272903 is about 394.2358843282.

The spelling of 61272903 in words is "sixty-one million, two hundred seventy-two thousand, nine hundred three".