61976947 has 2 divisors, whose sum is σ = 61976948. Its totient is φ = 61976946.

The previous prime is 61976921. The next prime is 61976977. The reversal of 61976947 is 74967916.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61976947 is a prime.

It is a super-2 number, since 2×61976947² = 7682283918881618, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61976947.

It is not a weakly prime, because it can be changed into another prime (61976977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30988473 + 30988474.

It is an arithmetic number, because the mean of its divisors is an integer number (30988474).

Almost surely, 2^61976947 is an apocalyptic number.

61976947 is a deficient number, since it is larger than the sum of its proper divisors (1).

61976947 is an equidigital number, since it uses as much as digits as its factorization.

61976947 is an odious number, because the sum of its binary digits is odd.

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

The square root of 61976947 is about 7872.5438709479. The cubic root of 61976947 is about 395.7401004379.

The spelling of 61976947 in words is "sixty-one million, nine hundred seventy-six thousand, nine hundred forty-seven".