4757947781 has 2 divisors, whose sum is σ = 4757947782. Its totient is φ = 4757947780.

The previous prime is 4757947763. The next prime is 4757947793. The reversal of 4757947781 is 1877497574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2515925281 + 2242022500 = 50159^2 + 47350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4757947781 is a prime.

It is a super-2 number, since 2×4757947781² = 45276134173445647922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4757947781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4757947741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2378973890 + 2378973891.

It is an arithmetic number, because the mean of its divisors is an integer number (2378973891).

Almost surely, 2^4757947781 is an apocalyptic number.

It is an amenable number.

4757947781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4757947781 is an equidigital number, since it uses as much as digits as its factorization.

4757947781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13829760, while the sum is 59.

The square root of 4757947781 is about 68977.8789250583. The cubic root of 4757947781 is about 1681.9247334056.

The spelling of 4757947781 in words is "four billion, seven hundred fifty-seven million, nine hundred forty-seven thousand, seven hundred eighty-one".