1497797761 has 2 divisors, whose sum is σ = 1497797762. Its totient is φ = 1497797760.

The previous prime is 1497797747. The next prime is 1497797779. The reversal of 1497797761 is 1677977941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1105163536 + 392634225 = 33244^2 + 19815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1497797761 - 2⁵ = 1497797729 is a prime.

It is a super-2 number, since 2×1497797761² = 4486796265713226242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1497797696 and 1497797705.

It is not a weakly prime, because it can be changed into another prime (1497797701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748898880 + 748898881.

It is an arithmetic number, because the mean of its divisors is an integer number (748898881).

Almost surely, 2^1497797761 is an apocalyptic number.

It is an amenable number.

1497797761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497797761 is an equidigital number, since it uses as much as digits as its factorization.

1497797761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4667544, while the sum is 58.

The square root of 1497797761 is about 38701.3922359390. The cubic root of 1497797761 is about 1144.1537605384.

The spelling of 1497797761 in words is "one billion, four hundred ninety-seven million, seven hundred ninety-seven thousand, seven hundred sixty-one".