650420757 has 18 divisors (see below), whose sum is σ = 1092884598. Its totient is φ = 371668752.

The previous prime is 650420753. The next prime is 650420773. The reversal of 650420757 is 757024056.

It can be written as a sum of positive squares in only one way, i.e., 428738436 + 221682321 = 20706^2 + 14889^2 .

It is not a de Polignac number, because 650420757 - 2² = 650420753 is a prime.

It is a super-2 number, since 2×650420757² = 846094322272906098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650420753) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 736998 + ... + 737879.

It is an arithmetic number, because the mean of its divisors is an integer number (60715811).

Almost surely, 2^650420757 is an apocalyptic number.

It is an amenable number.

650420757 is a deficient number, since it is larger than the sum of its proper divisors (442463841).

650420757 is a wasteful number, since it uses less digits than its factorization.

650420757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474897 (or 1474887 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 650420757 is about 25503.3479566899. The cubic root of 650420757 is about 866.4259758801.

It can be divided in two parts, 6504 and 20757, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 650420757 in words is "six hundred fifty million, four hundred twenty thousand, seven hundred fifty-seven".