280464731 has 2 divisors, whose sum is σ = 280464732. Its totient is φ = 280464730.

The previous prime is 280464689. The next prime is 280464803. The reversal of 280464731 is 137464082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280464731 - 2¹⁴ = 280448347 is a prime.

It is a super-2 number, since 2×280464731² = 157320930669804722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 280464691 and 280464700.

It is not a weakly prime, because it can be changed into another prime (280464131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140232365 + 140232366.

It is an arithmetic number, because the mean of its divisors is an integer number (140232366).

Almost surely, 2^280464731 is an apocalyptic number.

280464731 is a deficient number, since it is larger than the sum of its proper divisors (1).

280464731 is an equidigital number, since it uses as much as digits as its factorization.

280464731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 280464731 is about 16747.0812680897. The cubic root of 280464731 is about 654.5750062421.

The spelling of 280464731 in words is "two hundred eighty million, four hundred sixty-four thousand, seven hundred thirty-one".