61969477 has 2 divisors, whose sum is σ = 61969478. Its totient is φ = 61969476.

The previous prime is 61969451. The next prime is 61969511. The reversal of 61969477 is 77496916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59737441 + 2232036 = 7729^2 + 1494^2 .

It is a cyclic number.

It is not a de Polignac number, because 61969477 - 2¹⁵ = 61936709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61969477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61969447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30984738 + 30984739.

It is an arithmetic number, because the mean of its divisors is an integer number (30984739).

Almost surely, 2^61969477 is an apocalyptic number.

It is an amenable number.

61969477 is a deficient number, since it is larger than the sum of its proper divisors (1).

61969477 is an equidigital number, since it uses as much as digits as its factorization.

61969477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 61969477 is about 7872.0694229662. The cubic root of 61969477 is about 395.7242004542.

The spelling of 61969477 in words is "sixty-one million, nine hundred sixty-nine thousand, four hundred seventy-seven".