61954477 has 8 divisors (see below), whose sum is σ = 70645176. Its totient is φ = 53824512.

The previous prime is 61954457. The next prime is 61954481. The reversal of 61954477 is 77445916.

It can be written as a sum of positive squares in 4 ways, for example, as 1285956 + 60668521 = 1134^2 + 7789^2 .

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 61954477 - 2¹⁵ = 61921709 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 (61954457) 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, 139948 + ... + 140389.

It is an arithmetic number, because the mean of its divisors is an integer number (8830647).

Almost surely, 2^61954477 is an apocalyptic number.

It is an amenable number.

61954477 is a deficient number, since it is larger than the sum of its proper divisors (8690699).

61954477 is a wasteful number, since it uses less digits than its factorization.

61954477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280367.

The product of its digits is 211680, while the sum is 43.

The square root of 61954477 is about 7871.1166298055. The cubic root of 61954477 is about 395.6922689169.

The spelling of 61954477 in words is "sixty-one million, nine hundred fifty-four thousand, four hundred seventy-seven".