1007901997 has 2 divisors, whose sum is σ = 1007901998. Its totient is φ = 1007901996.

The previous prime is 1007901991. The next prime is 1007902043. The reversal of 1007901997 is 7991097001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543542596 + 464359401 = 23314^2 + 21549^2 .

It is a cyclic number.

It is not a de Polignac number, because 1007901997 - 2¹⁵ = 1007869229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1007901991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503950998 + 503950999.

It is an arithmetic number, because the mean of its divisors is an integer number (503950999).

Almost surely, 2^1007901997 is an apocalyptic number.

It is an amenable number.

1007901997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1007901997 is an equidigital number, since it uses as much as digits as its factorization.

1007901997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 1007901997 is about 31747.4722930819. The cubic root of 1007901997 is about 1002.6270913473.

Adding to 1007901997 its reverse (7991097001), we get a palindrome (8998998998).

It can be divided in two parts, 100 and 7901997, that added together give a palindrome (7902097).

The spelling of 1007901997 in words is "one billion, seven million, nine hundred one thousand, nine hundred ninety-seven".