1617261497 has 2 divisors, whose sum is σ = 1617261498. Its totient is φ = 1617261496.

The previous prime is 1617261461. The next prime is 1617261509. The reversal of 1617261497 is 7941627161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1495291561 + 121969936 = 38669^2 + 11044^2 .

It is a cyclic number.

It is not a de Polignac number, because 1617261497 - 2¹² = 1617257401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1617261797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808630748 + 808630749.

It is an arithmetic number, because the mean of its divisors is an integer number (808630749).

Almost surely, 2^1617261497 is an apocalyptic number.

It is an amenable number.

1617261497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617261497 is an equidigital number, since it uses as much as digits as its factorization.

1617261497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 1617261497 is about 40215.1898789500. The cubic root of 1617261497 is about 1173.7981365829.

The spelling of 1617261497 in words is "one billion, six hundred seventeen million, two hundred sixty-one thousand, four hundred ninety-seven".