801249997 has 2 divisors, whose sum is σ = 801249998. Its totient is φ = 801249996.

The previous prime is 801249991. The next prime is 801250027. The reversal of 801249997 is 799942108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652751401 + 148498596 = 25549^2 + 12186^2 .

It is a cyclic number.

It is not a de Polignac number, because 801249997 - 2³ = 801249989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 801249997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801249991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400624998 + 400624999.

It is an arithmetic number, because the mean of its divisors is an integer number (400624999).

Almost surely, 2^801249997 is an apocalyptic number.

It is an amenable number.

801249997 is a deficient number, since it is larger than the sum of its proper divisors (1).

801249997 is an equidigital number, since it uses as much as digits as its factorization.

801249997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 801249997 is about 28306.3596564447. The cubic root of 801249997 is about 928.8010127963.

The spelling of 801249997 in words is "eight hundred one million, two hundred forty-nine thousand, nine hundred ninety-seven".