70949831 has 4 divisors (see below), whose sum is σ = 72867432. Its totient is φ = 69032232.

The previous prime is 70949797. The next prime is 70949833. The reversal of 70949831 is 13894907.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 70949831 - 2²² = 66755527 is a prime.

It is a super-2 number, since 2×70949831² = 10067757037857122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70949833) 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, 958745 + ... + 958818.

It is an arithmetic number, because the mean of its divisors is an integer number (18216858).

Almost surely, 2^70949831 is an apocalyptic number.

70949831 is a deficient number, since it is larger than the sum of its proper divisors (1917601).

70949831 is a wasteful number, since it uses less digits than its factorization.

70949831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917600.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 70949831 is about 8423.1722646518. The cubic root of 70949831 is about 413.9842211230.

The spelling of 70949831 in words is "seventy million, nine hundred forty-nine thousand, eight hundred thirty-one".