340370781 has 4 divisors (see below), whose sum is σ = 453827712. Its totient is φ = 226913852.

The previous prime is 340370777. The next prime is 340370791. The reversal of 340370781 is 187073043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 340370781 - 2² = 340370777 is a prime.

It is a super-2 number, since 2×340370781² = 231704537117099922, which contains 22 as substring.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340370711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56728461 + ... + 56728466.

It is an arithmetic number, because the mean of its divisors is an integer number (113456928).

Almost surely, 2^340370781 is an apocalyptic number.

It is an amenable number.

340370781 is a deficient number, since it is larger than the sum of its proper divisors (113456931).

340370781 is a wasteful number, since it uses less digits than its factorization.

340370781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113456930.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 340370781 is about 18449.1403864787. The cubic root of 340370781 is about 698.2068260360.

The spelling of 340370781 in words is "three hundred forty million, three hundred seventy thousand, seven hundred eighty-one".