61951973 has 4 divisors (see below), whose sum is σ = 62824608. Its totient is φ = 61079340.

The previous prime is 61951963. The next prime is 61951979. The reversal of 61951973 is 37915916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61951973 - 2⁶ = 61951909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61951973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61951979) 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, 436211 + ... + 436352.

It is an arithmetic number, because the mean of its divisors is an integer number (15706152).

Almost surely, 2^61951973 is an apocalyptic number.

It is an amenable number.

61951973 is a deficient number, since it is larger than the sum of its proper divisors (872635).

61951973 is an equidigital number, since it uses as much as digits as its factorization.

61951973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872634.

The product of its digits is 51030, while the sum is 41.

The square root of 61951973 is about 7870.9575656333. The cubic root of 61951973 is about 395.6869379769.

The spelling of 61951973 in words is "sixty-one million, nine hundred fifty-one thousand, nine hundred seventy-three".